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Regulating the key performance parameters for Hg-based IR NLO chalcogenides via bandgap engineering strategy

Chinese Chemical Letters 2024年第10期35卷 516-520页

作者： A-Yang Wang sheng-hua zhou Mao-Yin Ran Xin-Tao Wu hua Lin Qi-Long Zhu State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences (CAS) Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China College of Chemistry Fuzhou University University of Chinese Academy of Sciences

Recently, non-centrosymmetric（NCS） Hg-based chalcogenides have garnered significant interest due to their strong second-harmonic-generation intensities(deff), making them attractive candidates for infrared nonlinear optical（IR-NLO） application. However, achieving both wide band gaps（Eg） and large phasematched deffsimultaneously in these materials remains a challenge due to their inherent constraints on each other. In this research, we have successfully obtained two quaternary NCS Hg-based chalcogenides, Rb2HgGe3S8and Cs2HgGe3S8, by implementing a bandgap engineering strategy that involves alkali metal introduction and Hg/Ge ratio regulation. Both compounds consist of 2D [Hg Ge3S8]2–anionic layers made of 1D [HgGeS6]6–chains and dimeric [Ge2S6]4–polyhedra arranged alternately, and the charge-balanced Rb+/Cs+cations located between these layers. Remarkably, Rb2HgGe3S8and Cs2HgGe3S8exhibit overall properties required for promising IR-NLO materials, including sufficient PM deff（0.55–0.70 × AgGaS2@2050 nm）, large Eg（3.27–3.41 e V）, giant laser-induced damage thresholds（17.4–19.7 ×AgGaS2@1064 nm）, broad optical transmission intervals（0.32–17.5 μm）, and suitable theoretical birefringence（0.069–0.086@2050 nm）. Furthermore, in-depth theoretical analysis reveals that the exceptional IRNLO performance is attributed to the synergy effects of distorted [HgS4] and [GeS4] tetrahedra. Our study provides a useful strategy for enhancing the Egand advancing Hg-based IR-NLO materials, which is expected to extended and implemented in other chalcogenide systems.

关键词： Bandgap engineering strategy Hg-based chalcogenides IR nonlinear material Structure-activity relationship Wide energy gap

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Textural and compositional zoning in plagioclase phenocrysts:implications for magma chamber processes in the Emeishan large Igneous Province,SW China

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Acta Geochimica 2023年第3期42卷 453-470页

作者： Qi Chen Song-Yue Yu Lie-Meng Chen sheng-hua zhou Jian Kang State Key Laboratory of Ore Deposit Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China University of Chinese Academy of Sciences Beijing 100049China

Textural and compositional zoning within plagioclase phenocrysts records the magma chamber processes,such as magma differentiation,magma recharge and mixing,and crustal *** plagioclase phenocrysts in the Daqiao and Qiaojia plagioclase-phyric basalts from the Emeishan Large Igneous Province(LIP)show complex textural and compositional zoning patterns,e.g.,normal,reverse,oscillatory,and patchy zoning *** plagioclase phenocrysts exhibit a core–rim normal zoning pattern(Pl-A)with euhedral high-An cores(An=76–78%,in mole fraction)and low-An rims(An=68–72%),indicative of the crystal regrowth processes caused by recharge of relatively evolved magmas after the formation of high-An *** phenocrysts have a core–rim reverse zoning pattern(Pl-B)with irregular ovaloid cores,characterized by extremely low An(60–61 mol%)and Ba(84–88 ppm)contents and extremely high87Sr/86Sr ratios(0.7120–0.7130).The rims of the Pl-B have relatively high An(69–72%),Ba(~160 ppm)contents,and low87Sr/86Sri(~0.7056).These Pl-B plagioclase phenocrysts preserve the information about the interaction between the crustal xenocrysts and the transporting *** plagioclase phenocrysts show a core–mantle–rim oscillatory zoning pattern(Pl-C)with multiple oscillations of An(70–80%),Ba(88–147ppm)from core to rim,revealing replenishment and mixing of multiple batches of basaltic melts with diverse compositions.87Sr/86Sr ratios of the Pl-C do not vary significantly(0.7050–0.7054).A small portion of phenocrysts has patchy patterns in the cores(Pl-D),where the low-An patches(72–75%)in form of elliptical or irregular elongated shapes were enclosed by the high-An domains(80–87%).These features can be attributed to crystal dissolution and regrowth processes during the reaction between earlyformed low-Cumulates and recharged hot primitive *** cores,mantles,and rims of different types of plagioclase phenocrysts(except the core of Pl-B)commonly display nearly constant Sr isotopic comp

关键词： Emeishan large Igneous Province Plagioclase-phyric basalt Compositional zoning Plagioclase phenocryst Magma replenishment

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Simple yet extraordinary: Super-polyhedra-built 3D chalcogenide framework of Cs_(5)Ga_(9)S_(16) with excellent infrared nonlinear optical performance

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Chinese Chemical Letters 2023年第7期34卷 400-403页

作者： Hong Chen Mao-Yin Ran sheng-hua zhou Xin-Tao Wu hua Lin Qi-Long Zhu State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of Sciences(CAS)Fuzhou 350002China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350108China University of Chinese Academy of Sciences Bejing 100049China

Non-centrosymmetric chalcogenides are attracting considerable attention as highly promising infrared nonlinear optical (IR-NLO) candidates,but it is challenging to simultaneously achieve sufficient secondharmonic-generation coefficient (d_(eff)>0.5×AgGaS_(2)) and large energy gap (E_g>3.5 e V).In this work,a novel ternary chalcogenide,Cs_(5)Ga_(9)S_(16) with an ultra-wide E_gof 4.05 e V,has been successfully *** sulfide belongs to the monoclinic space group Pn (No.7) with a novel 3D anionic[Ga_(9)S_(16)]^(5–)framework that is formed by super-polyhedral[Ga_(9)S_(23)]units through corner-sharing S *** a unique crystal structure displays desirable characteristics which indicate a promising IR-NLO candidate:favourable phase-matching feature,sufficient d_(eff)(0.7×AgGaS_(2)),ultrahigh laser-induced damage threshold (31.6×AgGaS_(2)) and broad transparent region (0.27-14.96μm).In addition,systematic theoretical studies and structural analysis suggest that the desirable IR-NLO performances can be attributed to the super-polyhedral building *** finding may provide useful insight into the understanding and designing other high-performance IR-NLO candidates with super-polyhedral-built structures.

关键词： Chalcogenide IR nonlinear optic Super-polyhedra-built framework Wide energy gap Structure-activity relationship

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Heterointerface engineering of Ru/RuS_(2) on N/S-doped hollow mesoporous carbon for promoting alkaline hydrogen evolution

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Chinese Chemical Letters 2023年第7期34卷 373-378页

作者： Ning Wang Dong-Dong Ma sheng-hua zhou Meng-Ke Hu Xiaofang Li Xin-Tao Wu Qi-Long Zhu State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of Sciences(CAS)Fuzhou 350002China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of Chin1 Fuzhou 350108China College of Chemistry and Chemical Engineering Jiangxi Normal UniversityNanchang 330022China University of Chinese Academy of Sciences Beijing 100049China

Alkaline hydrogen evolution reaction (HER) suffers from a sluggish kinetic,which requires the elaborate catalytic interface and micro-nanoscale architecture engineering of the electrocatalysts to accelerate the water dissociation and hydrogen ***,the heterointerface engineering was proposed for promoting the alkaline HER by constructing the highly exposed Ru/RuS_(2) heterostructures homogeneously distributed on hollow N/S-doped carbon microspheres (Ru/RuS_(2)@h-NSC).Benefited from the synergistic effect of heterointerfacial Ru/RuS_(2),the high accessibility of the active sites on both inner and outer surface of mesoporous shells and the efficient mass transport,Ru/RuS_(2)@h-NSC affords a remarkable catalytic performance with an overpotential of 26 mV@10 mA/cm^(2) for alkaline HER,outperforming most of the state-of-the-art *** applying Ru/RuS_(2)@h-NSC and its oxidized derivate for the overall alkaline water splitting,the required cell voltage is much lower than that of the commercial Pt/C||RuO_(2)pair to achieve the same current *** study may allow us to guide the design of micro-nanoreactors with optimal catalytic interfaces for promising electrocatalytic applications.

关键词： Hydrogen evolution reaction Heterostructures N/S-doped carbon Hollow mesoporous microspheres Ru nanoparticles

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Effect of Chinese national holidays and weekends versus weekday admission on clinical outcomes in patients with STEMI undergoing primary PCI

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Journal of Geriatric Cardiology 2017年第10期14卷 604-613页

作者： Liang TANG Peng-Fei CHEN Xin-Qun HU Xiang-Qian SHEN Yan-Shu ZHAO Zhen-Fei FANG sheng-hua zhou Department of Cardiology the Second Xiangya Hospital of Central South University Changsha China

Background Data regarding the influence of weekends and Chinese national holiday＇s admission on the outcomes of patients with ST-elevated myocardial infarction （STEMI） is lacking. This study sought to investigate the effect of Chinese national holidays and weekend admission on outcomes in patients with STEMI undergoing primary percutaneous coronary intervention （PPCI）. Methods Patients pre- senting with STEMI within 12 h of symptom onset who underwent PPCI were retrospectively enrolled. The primary outcome of in-hospital mortality and major adverse cardiovascular events in patients presenting Chinese national holiday＇s and weekends versus weekdays was evaluated. Results A total of 441 STEMI patients were enrolled in this study. Of these, 129 （29.3%） patients were admitted during Chinese national holidays and weekends and 312 （70.7%） during weekdays. Patients admitted during holidays and weekends were more likely to present with Killip class Ⅲ-Ⅳ. Patients admitted during holidays and weekends experienced a significantly longer door-to-baUoon time, symptom onset-to-door time as well as symptom onset-to-balloon time. The in-hospital mortality between patients presenting holidays and weekends versus weekdays was comparable. However, patients admitted during holidays and weekends have a signitieantly higher rate of in-hospital major adverse cardiovascular events. Multivariate analysis demonstrated that holidays and weekends admission was independ- ently associated with adverse outcomes. Conclusions In China, STEMI patients undergoing PPCI during national holidays and weekends have worse in-hospital outcomes compared to those admitted during weekdays. These findings suggest that continuous efforts should be undertaken to enhance the Chinese healthcare system and to ensure that comparable outcomes are achieved for all STEMI patients regardless of time of presentation.

关键词： Holidays Myocardial infarction Percutaneous coronary intervention Weekends

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Deep genome skimming reveals the hybrid origin of Pseudosasa gracilis (Poaceae: Bambusoideae)

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Plant Diversity 2024年第3期46卷 344-352页

作者： Xiang-zhou Hu Cen Guo sheng-Yuan Qin De-Zhu Li Zhen-hua Guo Germplasm Bank of Wild Species Kunming Institute of BotanyChinese Academy of SciencesKunmingYunnan 650201China University of Chinese Academy of Sciences Beijing 100049China

Pseudosasa gracilis(Poaceae:Bambusoideae)is a temperate woody bamboo species endemic to Southcentral China with a narrow *** phylogenetic studies revealed an unexpected,isolated phylogenetic position of *** we conducted phylogenomic analysis by sampling populations of *** and its sympatric species *** and Sinosasa polytricha reflecting different genomic signals,by deep genome *** molecular evidence from chloroplast genes and genome-wide SNPs,we deciphered the phylogenetic relationships of *** plastid and nuclear data indicate that *** is more closely related to Sinosasa,which is discordant with the taxonomic *** further explore this molecular-morphological conflict,we screened 411“perfect-copy”syntenic genes to reconstruct phylogenies using both the concatenation and coalescent *** observed extensive discordance between gene trees and the putative species tree.A significant hybridization event was detected based on 411 genes from the D subgenome,showing *** was a hybrid descendant between Sinosasa longiligulata and ***,with 63.56%and 36.44%inheritance probabilities of each ***,introgression events were detected in the C subgenome between *** and *** in the same distribution *** findings suggest that sympatric hybridization and introgression play a crucial role in the origin of *** providing an empirical example of bamboo of hybrid origin using comprehensive analyses based on genomic data from different inheritance systems and morphological characters,our study represents a step forward in understanding of reticulate evolution of bamboos.

关键词： Phylogenomics Hybridization Introgression Pseudosasa gracilis Pseudosasa Sinosasa

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Learnware:small models do big

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Science China(Information Sciences) 2024年第1期67卷 39-50页

作者： Zhi-hua zhou Zhi-Hao TAN National Key Laboratory for Novel Software Technology Nanjing University

There are complaints about current machine learning techniques such as the requirement of a huge amount of training data and proficient training skills,the difficulty of continual learning,the risk of catastrophic forgetting,and the leaking of data privacy/*** research efforts have been focusing on one of those concerned issues separately,paying less attention to the fact that most issues are entangled in *** prevailing big model paradigm,which has achieved impressive results in natural language processing and computer vision applications,has not yet addressed those issues,whereas becoming a serious source of carbon *** article offers an overview of the learnware paradigm,which attempts to enable users not to need to build machine learning models from scratch,with the hope of reusing small models to do things even beyond their original purposes,where the key ingredient is the specification which enables a trained model to be adequately identified to reuse according to the requirement of future users who know nothing about the model in advance.

关键词： artificial intelligence machine learning learnware

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Comment to "Deep vein thrombosis induced by vasculitis in the Behcet's syndrome"

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Chinese Medical Journal 2019年第4期132卷 501-502页

作者： Ya-Nan Guo Shi Tai Liang Tang sheng-hua zhou Department of Cardiology the Second Xiangya Hospital of Central South UniversityChangshaHunan 410008China

To the Editor:We read with interest the case reported by Chen and Guan[1] about a 37-year-old male with a 5-year history of Behcet's syndrome (BS)complicated by deep vein thrombosis (DVT)for 2 *** patient developed upper abdominal pain after his warfarin was discontinued for 7 days and urgent abdominal computed tomography revealed multiple microstones in the left kidney and no other abnormality was *** symptoms recurred the following morning with chest pain, dyspnea,and cardiac arrest,and he was declared dead after 1 hour of resuscitation.

关键词： vasculitis patient abnormality

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Molecularly Dispersed Heterogenized Metallomacrocycles:Molecular Structure Sensitivity of CO_(2) Electrolysis

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CCS Chemistry 2023年第8期5卷 1827-1840页

作者： Dong-Dong Ma Shu-Guo Han sheng-hua zhou Wen-Bo Wei Xiaofang Li Bo Chen Xin-Tao Wu Qi-Long Zhu State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of Sciences(CAS)Fuzhou 350002Fujian Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350108Fujian University of Chinese Academy of Sciences Beijing 100049 Department of Chemistry City University of Hong KongHong Kong 999077

Revealing the structure-performance relationships of the molecularly dispersed heterogenized metallomacrocycles(MDHMs)withπ-conjugated heterojunctions is of great,yet largely unmet,significance for realizing the rational regulation of selectivity,Faradaic efficiency,and durability in the electrochemical CO_(2) reduction reaction(CO_(2)RR).Herein,we describe new insights into the molecularstructure sensitivity of the electrochemical CO_(2)RR over the MDHMs through peripherally functionalizing the heterogenized nickel phthalocyanines with diverse methylimidazole *** studied experimentally and theoretically,the heterointerfacial effect and self-built microenvironment of the MDHMs are significantly modulated by accurate structural clipping at the molecular level,predominately steering their electrocatalytic performance for CO_(2)-to-CO conversion in both H-type and flow electrolytic ***,the optimized MDHM,2MIMCβNiPc/CNT,displays a significantly improved electrocatalytic performance for CO_(2)RR with near-unity Faradaic efficiency and large current ***,the paired electrolysis systems with the MDHMs as the multifunctional electrocatalysts was developed for making full use of the anodic and cathodic reactions,which shows a new and profitable prospect for energy optimization,pollutant regeneration,and green electrosynthesis in a modular form,and also provides guidance for the design and synthesis of novel effi-cient yet economical electrocatalysts.

关键词： metallomacrocycles π-conjugated heterojunctions carbon nanotubes CO_(2)electroreduction molecular structure sensitivity paired electrolysis

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Transcatheter treatment of Lutembacher syndrome

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Chinese Medical Journal 2005年第21期118卷 1843-1845页

作者： SHEN Xiang-qian zhou sheng-hua zhou Tao QI Shu-shan FANG Zhen-fei LV Xiao-ling Department of Cardiology Second Xiangya Hospital Central South University Changsha 410011 China

Lutembacher syndrome, a combination of congenital atrial septal defect （ ASD ） complicated by acquired mitral stenosis, has been traditionally treated by open-heart surgery. With the introduction of transcatheter closure of ASD and percutaneous balloon mitral valvuloplasty, then Lutembacher syndrome can be treated percutaneously. Percutaneous management of Lutembacher syndrome can obviate the morbidity and mortality associated with cardiac surgery, the psychological trauma of a thoracotomy scar and the possibility of repeat thoracotomy for mitral restenosis. So the technique may be ideal for treatment of Lutembacher syndrome.

关键词： Lutembacher syndrome mitral stenosis atrial septal defect balloon dilatation

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