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Chinese Journal of Chemistry 2011年第10期29卷 2075-2080页

作者：刘培念夏斐任玉洁陈君琴 Key Lab for advanced materials and institute of Fine chemicals East China University of Science and Technology Shanghai 200237 China School of Chemistry and Environmental Engineering Shanghai Institute of Technology Shanghai 200235 China

The microwave-assisted substitution of β-dicarbonyl compounds with secondary alcohols has been achieved efficiently, using very cheap fluoroboric acid （HBF4） as the catalyst. For various β-dicarbonyl compounds and a series of secondary alcohols, the direct substitution gives high yields after only 5 min of microwave irradiation.

关键词： substitution alcohols acid catalysis dicarbonyl compounds microwave chemistry

Research progress of photocatalysis based on highly dispersed titanium in mesoporous SiO_2

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Chinese Chemical Letters 2019年第4期30卷 853-862页

作者： Chencheng Dong Jiahui Ji Zhe Yang Yifei Xiao Mingyang Xing Jinlong Zhang Key Laboratory for advanced materials and institute of Fine chemicals School of Chemistry & Molecular Engineering East China University of Science and Technology Department of Civil Engineering The University of Hong Kong

With the development of the human economy and green chemistry, people pay much more attention to environmental safety. Correspondingly, mesoporous TiO_2 and its correlated photocatalysts are able to help people seek for better life. In this review, first of all, we briefly introduce the preparations and applications of mesoporous TiO_2-SiO_2 materials, which exhibit excellent performance in pollutants decomposition and H_2 evolution in photocatalysis. Then, we review the mesoporous composites of TiSiO_2 materials, which are ideal materials used in the photoreduction of air pollutants such as CO_2, NO and NO_2. It is powerfully evident from the literature surveys that these TiO_2 based mesoporous photocatalysts possess a large potential in environment and energy development.

关键词： Mesoporous TiO2-SiO2 Ti-SiO2 Photocatalysis Photo-degradation Water splitting CO2 reduction

Static and Ultrafast Transient Photophysics of Mono- and Dual-Branched Triarylamines

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Chinese Physics Letters 2010年第6期27卷 246-249页

作者： LI Feng-Ming MENG Fan-Shun FENG Wen-Ke WANG Shu-Feng TIAN He GONG Qi-Huang State Key Laboratory for Mesoscopic Physics and Department of Physics Peking University Beijing 100871 Labs for advanced materials and institute of Fine chemicals East China University of Science and Technology Shanghai 200237

Mono- and dual-branched molecules, { 4-[2-（4-benzothiazol-2-yl-phenyl）-vinyl]-phenyl}-（4-methoxy-phenyl）-phenyl- amine （BS1） and bis-{4-[2- （4-benzothiazol-2-yl-phenyl）-vinyI]-phenyl}-（4-methoxy-phenyI）-phenyl-amine （BS2）, are investigated with one- and two-photon static spectroscopy, and the femtosecond fluorescence up-conversion technique. The molecules show branch-based fluorescence emission at low quantum yield. U1trafast non-radiative decay on a picosecond time scale is found and is attributed to intramolecular charge-transfer bridged by the central triphenylamine. The two-photon absorption cross-sections of BS1 and BS2 are 19.1 and 19.4 GM, respectively.

关键词： Branching Branches Fluorescence

Organic sensitizers with different thiophene units as conjugated bridges:molecular engineering and photovoltaics

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Science China Chemistry 2017年第2期60卷 231-236页

作者： Wenqin Li Zihua Wu Jinmin Wang Weiwei Zhang Min Wu Weihong Zhu School of Environmental and materials Engineering College of EngineeringShanghai Second Polytechnic University Shanghai Key Laboratory of Functional materials Chemistry Key Laboratory for Advanced Materials and Institute of Fine ChemicalsSchool of Chemistry and Molecular EngineeringEast China University of Science and Technology Department of Chemistry University of California

Three structural modifications with incorporation of alkyl,alkoxy and vinyl bond into the skeleton of thiophene bridge in D-π-A featured organic sensitizers are specifically developed for insight into their influences on photophysical,electrochemical as well as photovoltaic properties in nanocrystalline TiO_2-based dye sensitized solar cells(DSSCs).The insertion of vinyl bond into the conjugation bridge leads to the molecular planar configuration,and the conjugation bridge of 3,4-ethylenedioxythiophene(EDOT)is prone to positively shift its highest occupied molecular orbital(HOMO).The electrochemical impedance spectroscopy(EIS)results indicate that the grafted long alkyl chain onto thiophene is favorable to suppress dye aggregation when adsorbed onto TiO_2film and modification on interface of TiO_2/dye/electrolyte,resulting in a relatively high open-circuit voltage(V_(oc)).Under optimized conditions,dye LS-4 bearing hexylthiophene as the conjugation bridge shows a relatively high overall conversion efficiency of5.45%,with a photocurrent of 11.61 mA cm^(-2),V_(oc)of 744 mV.

关键词： organic sensitizers conjugated bridge solar cells photovoltaic performances

A new breakthrough in selective catalysis: metal-organic framework nanocomposites with sandwich structure

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Science Bulletin 2016年第22期61卷 1726-1727页

作者： Fengwei Huo Key Laboratory of Flexible Electronics (KLOFE) & institute of advanced materials (IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing Tech University

Selective hydrogenation of C=O group that is conjugated with a C=C group in a,b-unsaturated aldehydes(R–CH=CH–CHO)is one of important reactions in industry due to the resulting product unsaturated alcohols(R–CH=CH–CH2OH)with broad applications in synthesis of fine chemicals such as flavour,fragrance,pharmaceuticals[1].However,despite the increasing reported catalysts on the selectivity[2,3],developing an effective

关键词： MOFs A new breakthrough in selective catalysis metal-organic framework nanocomposites with sandwich structure

Photocaged prodrug under NIR light-triggering with dual-channel fluorescence: in vivo real-time tracking for precise drug delivery

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Science China Chemistry 2018年第10期61卷 1293-1300页

作者： Zhiqian Guo Yaguang Ma Yajing Liu Chenxu Yan Ping Shi He Tian Wei-Hong Zhu Key Laboratory for advanced materials and institute of Fine chemicals Shanghai Key Laboratory of Functional Materials Chemistry School of Chemistry and Molecular Engineering East China University of Science and Technology State Key Laboratory of Bioreactor Engineering East China University of Science and Technology

Light-triggered drug delivery system is an effective strategy for precise diagnosis and therapy in cancer treatment. However, it suffers from difficultly balancing the dosimetry of drug with light dose and a lack of in vivo models for validating their clinical benefits. Here we report an unprecedented near-infrared(NIR) light photocaged cyanine-based prodrug Cy-CPT-Biotin with dual-channel fluorescence mode, enabling NIR light to precisely regulate where, when and how the intact and active prodrugs are delivered. The synergy of photochemical reaction and modulation in π-conjugated polyene backbone of cyanine can fully perform distinct dual-channel fluorescence changes in a NIR light-mediated manner. The prodrug has striking characteristics of excellent tumor-targeting ability, real-time monitoring of the in vivo behaviors by dual-channel mode and NIR-light triggering,especially for achieving fine regulation and on-demand drug release in the precise dosimetry of drug with light dose in living animals. This optical orthogonality strategy that conjuncts with NIR light-triggered and dual-channel fluorescence in vivo imaging provides a powerful tool for in vivo real-time tracking and finely tuning the prodrug release for precise drug delivery.

关键词： near-infrared cyaninc dye dual-channel fluorescence drug-release photocage tumor targeting

Synergistic effect of bimetallic RuPt/TiO_(2) catalyst in methane combustion

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Rare Metals 2023年第1期42卷 165-175页

作者： Shi-Ying Cao Fan Ye Ni-Ni Zhang Yang-Long Guo Yun Guo Li Wang Sheng Dai Wang-Cheng Zhan Key Laboratory for advanced materials and Research institute of Industrial Catalysis School of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai200237China Key Laboratory for advanced materials and Feringa Nobel Prize Scientist Joint Research Centre Institute of Fine ChemicalsSchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai200237China

Designing metal compounds based on their structure and chemical composition is essential in achieving desirable performance in methane oxidation,because of the synergistic effect between different metal ***,a bimetallic Ru-Pt catalyst on TiO_(2) support(RuPt-O/TiO_(2)) was prepared by in situ reduction followed by calcination in *** with monometallic catalysts(Ru-O/TiO_(2) and Pt-O/TiO_(2)),the synergistic effect of mixed metals endowed bimetallic catalysts with excellent stability and outstanding performance in methane oxidation,with a reaction rate of 13.9×10^(-5)mol^(-1)_(CH_(4))·g^(-1)_(Ru+Pt)·s^(-1)at 303℃.The varied characterization results revealed that among the bimetallic catalysts,RuO_(2)was epitaxially grown on the TiO_(2) substrate owing to lattice matching between them,and part of the PtO_(x) adhered to the RuO_(2) surface,in addition to a single PtO_(x) nanoparticle with 4 nm in ***,Pt mainly existed in the form of Pt2+and Pt4+and a small amount of zero valence in the bimetallic catalyst,prompting the adsorption and activation of methane as the first and rate-controlling step for CH_(4) *** importantly,the RuO_(2) species provided additional oxygen species to facilitate the redox cycle of the PtO_(x) *** study opens a new route for structurally designing promising catalysts for CH4oxidation.

关键词： Synergistic effect Bimetallic catalyst Methane combustion Redox cycle

Visible-light-induced photocatalytic CO_(2)reduction over zirconium metal organic frameworks modified with different functional groups

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Journal of Environmental Sciences 2023年第10期132卷 22-30页

作者： Yuexian Du Guang’an Jie Huilin Jia Jiahui Liu Jieyu Wu Yanghe Fu Fumin Zhang Weidong Zhu Maohong Fan Key Laboratory of the Ministry of Education for advanced Catalysis materials Institute of Physical ChemistryZhejiang Normal UniversityJinhua 321004China Zhejiang Engineering Laboratory for Green Syntheses and Applications of Fluorine-Containing Specialty chemicals Institute of Advanced Fluorine-Containing MaterialsZhejiang Normal UniversityJinhua 321004China Department of Chemical and Petroleum Engineering University of WyomingLaramieWY 82071USA

The reduction of CO_(2)into high value-added chemicals and fuels by a photocatalytic technology can relieve energy shortages and the environmental problems caused by greenhouse *** the current work,an amino-functionalized zirconium metal organic framework(Zr-MOF)was covalently modified with different functional groups via the condensation of Zr-MOF with 2-pyridinecarboxaldehyde(PA),salicylaldehyde(SA),benzaldehyde(BA),and trifluoroacetic acid(TA),named Zr-MOF-X(X=PA,SA,BA,and TA),respectively,through the post-synthesis *** with Zr-MOF and Zr-MOF-TA,the introduction of PA,SA,or BA into the framework of Zr-MOF can not only enhance the visible-light harvesting and CO_(2)capture,but also accelerate the photogenerated charge separation and transfer,thereby improving the photocatalytic ability of Zr-MOF for CO_(2)*** results indicate that the modification of Zr-MOF with electron-donating groups can promote the photocatalytic CO_(2)***,the current work provides an instructive approach to improve the photocatalytic efficiency of CO_(2)reduction through the covalent modification of MOFs.

关键词： Photocatalysis CO_(2)reduction Metal organic frameworks Post-synthesis modification Electric effect

Research progress of graphene-based nanomaterials for the environmental remediation

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Chinese Chemical Letters 2020年第6期31卷 1462-1473页

作者： Xiaoru Pan Jiahui Ji Nana Zhang Mingyang Xing Department of Chemistry and Chemical Engineering Weifang UniversityWeifang 261061China Key Laboratory for advanced materials and institute of Fine chemicals East China University of Science and TechnologyShanghai 200237China

Graphene is a two-dimensional nanomaterial with huge surface area,high carrier mobility and high mechanical *** of its great potential in nanotechnology and environmental protection,it has attracted much attention in environmental and energy fields since its discovery in *** graphene is a star material,many reviews have introduced its use in terms of energy,the research progress in the field of environment,especially water pollution control,has been rarely ***,we review exhaustively the research progress of graphene-based materials in environmental pollution remediation in the past ten ***,the advantages and classification of graphene were ***,the research progress and main achievements of graphene and its composites in the fields of photocatalytic degradation,pollutant adsorption and water treatment were emphatically described,and the mechanism of action in the above fields was ***,we discuss the problems existing in the preparation and summarize the application of graphene in the environment.

关键词： Graphene Nanomaterial Photocatalytic degradation Pollutant adsorption Water treatment

Efficient dye-sensitized solar cells based on concerted companion dyes:Systematic optimization of thiophene units in the organic dye components

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Chinese Chemical Letters 2022年第9期33卷 4313-4316页

作者： Jiaxin Luo Zhengli Xie Jiazhi Zou Xinyan Wu Xueqing Gong Chengjie Li Yongshu Xie Key Laboratory for advanced materials and institute of Fine chemicals Centre for Computational Chemistry and Research Institute of Industrial CatalysisSchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China

To develop efficient concerted companion(CC)dyes for fabricating high-performance DSSCs,three organic dyes XL1-XL3 have been designed by varying the position and number of theβ-hexylthiophene(HT)bridges,and these organic dye units are covalently linked with our previously reported porphyrin dye XW10 to construct the corresponding CC dyes *** the organic dyes,XL3 contains twoβ-hexylthiophene units at both the donor and acceptor parts and thus possesses stronger light-harvesting capability in the green light *** of the most complementary absorption between XL3 and XW10 as well as the excellent photovoltaic behavior of the individual XL3 dye,the corresponding CC dye XW76 affords the best PCE(10.78%)among all the CC *** coadsorption with CDCA,XW76 affords a highest PCE of 11.35%,which outperforms the previous cosensitization system of XW10+*** work provides an approach for developing efficient DSSCs based on CC dyes composed of an organic dye unit with suitableπspacers inserted at appropriate positions.

关键词： Dye sensitized solar cells Concerted companion dyes Porphyrin dyes Cosensitization