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Smart Supramolecular Nanosystems for Bioimaging and Drug Delivery

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Chinese Journal of Chemistry 2015年第1期33卷 59-70页

作者： peipei yang Lei Wang Hao Wang CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety National Center for Nanoscience and Technology(NCNST)Beijing 100190China

The application of smart supramolecular nanosystems in biomedicine increases rapidly and offers promising prospects for disease diagnostics and *** nanosystems such as liposomes,micelles,or-ganic nanoaggregates and metallic nanostructures *** been widely explored as diagnostic/therapeutic ***,we review the recent advances in supramolecular nanosystems with different builtin reporters,e.g.,fluorescent,magnetic and photoacoustic signals for *** addition,the substantial progress of supramolecular nanosystems as drug delivery carriers for cancer therapy,including chemotherapy,photothermal and photodynamic therapies is also summarized.

关键词： supramolecular chemistry nanosystems bioimaging drug delivery

Two new free-living nematode species (Comesomatidae) from the mangrove wetlands in Fujian Province, China

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Acta Oceanologica Sinica 2018年第10期37卷 161-167页

作者： GUO Yuqing CHANG Yu yang peipei Fujian Provincial Key Laboratory of Marine Fishery Resources and Eco-environment Fisheries College Jimei University

Two new free-living marine nematode species from the mangrove wetlands of Fujian Province, China are identified and illustrated. Sabatieria conicoseta sp. nov. is characterized by its short conical somatic setae. There are 12-15 tubular pre-cloacal supplements and 12-15/Jm long straight gubernacular apophyses. Dorylaimopsis papilla sp. nov. is characterized by spicules which are 1.5-1.8 a. b. d, long with media cuticularized strip along entire spicules, and have a cephalated proximal end with small hooked. There are 16-18 small papillate precloacal supplements and 37-40 μm long dorso-caudal gubernacular apophyses.

关键词： free-living marine nematode new species Sabatieria Dorylaimopsis mangrove

KLVFF peptide functionalized nanoparticles capture Aβ_(42) by co-assembly for decreasing cytotoxicity

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Chinese Chemical Letters 2018年第12期29卷 1811-1814页

作者： peipei yang Chao yang Kuo Zhang Lei Wang Hao Wang CAS Center for Excellence in Nanoscience CAS Key Laboratory for Biomedical Effects of Nanomaterials and NanosafetyNational Center for Nanoscience and Technology (NCNST)

The accumulation of extracellular senile plagues of amyloid β-proteins(Aβ) in the patient brain is one of most important facture in Alzheimer’s disease(AD), which is resulted from abnormal self-assembly of Aβpeptide. Nanoparticles show greatly potential for therapeutic studies due to the sophisticated surface which can mimic the functionality of protein. Herein, we design the bis(pyrene)-Lys-Leu-Val-Phe-PheGly-poly ethylene glycol(BP-KLVFFGPEG) based nanoparticles, which capture Aβthrough recognition and co-assembly of KLVFF. The resulting co-assemblies show different morphologies, such as large aggregates, nanoparticles and nanofibers corresponding to the different length chain of PEG, leading to different capture efficiencies. The co-assembly strategy shows a decrease of cytotoxicity, potentially for AD treatment.

关键词： Co-assembly Morphology Capture Nanoparticles Aβ

Food restriction decreases BMR,body and organ mass,and cellular energetics,in the Chinese Bulbul(Pycnonotus sinensis)

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Avian Research 2018年第4期9卷 370-380页

作者： Yiying Zhang Ke yang peipei yang Yingshi Su Weihong Zheng Jinsong Liu School of Life and Environmental Sciences Wenzhou UniversityWenzhou’s Chashan University TownWenzhou 325035China Zhejiang Provincial Key Lab for Water Environment and Marine Biological Resources Protection Wenzhou 325035China

Background: Food is an important environmental factor that affects animals' energy metabolism and food shortage has significant effects on animals' behavior, physiology and biochemistry. However, to date few studies have focused on the thermogenesis and its effects on the body condition of birds. In this study, we examined the effects of food restriction on the body mass, basal metabolic rate(BMR) and body composition, and several physiological, biochemical and molecular markers potentially related to thermogenesis, in the Chinese Bulbul(Pycnonotus sinensis).Methods: Birds in the control group were provided with food ad libitum whereas those in the food restriction group were provided with one-half of the usual quantity of food for 12 days. Oxygen consumption was measured using an open-circuit respirometry system. Mitochondrial state 4 respiration and cytochrome c oxidase(COX) activity in the liver and pectoral muscle were measured with a Clark electrode. Avian uncoupling protein(avUCP) mRNA expression was determined in pectorals muscle with quantitative Real-time ***:Chinese Bulbuls in food restriction group decreased in body mass,BMR and internal organ(heart,kidneys,small intestine and total digestive tract)mass compared with the control group over the 12-day period of food *** in the food restriction group also had lower levels of state-4 respiration,COX activity in the liver and muscle,and mitochondrial avUCP gene expression in muscle compared to the control *** was positively correlated with body mass,state 4 respiration in the liver and COX activity in the ***:Our data indicate that Chinese Bulbuls not only sustain food shortage through simple passive mechanisms,such as reducing body and organ mass and energy expenditure,but also by reducing energetic metabolism in the liver and muscle.

关键词： Avian uncoupling protein Basal metabolic rate Cytochrome c oxidase Food restriction Pycnonotus sinensis State-4 respiration

From discrete [Mn_4] cluster to 1D complex: Two new mixed-valence manganese complexes with slow magnetization relaxation

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Science China Chemistry 2009年第9期52卷 1463-1469页

作者： yang peipei & LI LiCun Department of Chemistry, Nankai University, Tianjin 300071, China Department of Chemistry Nankai University Tianjin 300071 China

A tetranuclear manganese complex [Mn4(HL)4(MeOH)4(SCN)2]·3MeOH (1) and a one-dimensional assembly of [Mn4] units, [Mn4(HL)4(MeOH)4(N(CN)2)2]·2.5MeOH (2) (H3L = 2,6-bis(hydroxymethyl)-4-methyl-phenol), have been synthesized and studied. Complexes 1 and 2 crystallize in the triclinic space group P 1and monoclinic space group P21/n, respectively. Complex 1 possesses a mixed-valence tetranuclear dicubane unit, which comprises two MnⅡ and two MnⅢ ions. Complex 2 is built from the similar tetranuclear [Mn4] units connected through two N(CN)2-anions into a 1-D chain. The temperature dependence of the magnetic susceptibilities of 1 and 2 indicates ferromagnetic interactions between the manganese ions. Frequency-dependent out-of-phase signals of alternating current magnetic susceptibilities are observed in the low temperature range for both complexes, indicating a slow magnetic relaxation.

关键词： tetranuclear manganese complex 1D complex magnetic properties slow magnetic relaxation

Noncovalent cross-linked engineering hydrogel with low hysteresis and high sensitivity for flexible self-powered electronics

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Journal of Energy Chemistry 2024年第7期94卷 136-147页

作者： Hang Yuan Shaowei Han Jia Wei Songwei Li peipei yang Hao-yang Mi Chuntai Liu Changyu Shen National Engineering Research Center for Advanced Polymer Processing Technology Key Laboratory of Materials Processing and Mold(Ministry of Education)Zhengzhou UniversityZhengzhou450002HenanChina Yunnan TobaccoQuality Inspection&Supervision Station Kunming 650106YunnanChina

In this study,the hydrogel network was reinforced by covalent-like hydrogen bonding,and the strong binding ability of boron-nitrogen coordination served as the main driving *** them,acrylamide(AM)and 3-acrylamidophenylboronic acid(AAPBA)were the main body,and the numerous hydroxyl groups in the trehalose(Treh)molecule and other polymer groups formed strong hydrogen bonding interactions to improve the mechanical properties of the PAM/PAAPBA/Treh(PAAT)hydrogel and ensured the simplicity of the synthesis *** hydrogel possessed high strain at break(1239%),stress(64.7 kPa),low hysteresis(100%to 500%strain,corresponding to dissipation energy from 1.37 to 7.80 kJ/m^(3)),and outstanding cycling stability(retained more than 90%of maximum stress after 200 ten-sile cycles).By integrating carbon nanotubes(CNTs)into PAAT hydrogel(PAATC),the PAATC hydrogel with excellent strain response performance was successfully *** PAATC conductive hydro-gel exhibited high sensitivity(gauge factor(GF)=10.58 and sensitivity(S)=0.304 kPa^(-1)),wide strain response range(0.5%-1000%),fast response time(450 ms),and short recovery time(350 ms),excellent fatigue resistance,and strain response ***,the PAATC-based triboelectric nanogener-ator(TENG)displayed outstanding energy harvesting performance,which shows its potential for appli-cation in self-powered electronic devices.

关键词： Low hysteresis Covalent-like hydrogen bonding Boron-nitrogen coordination Hydrogel sensor Triboelectric nanogenerator

Recent Advances in Near-Infrared Absorption Nanomaterials as Photoacoustic Contrast Agents for Biomedical Imaging

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Chinese Journal of Chemistry 2015年第1期33卷 35-52页

作者： Juchen Zhang Zengying Qiao peipei yang Jie Pan Lei Wang Hao Wang State Key Laboratory of Hollow Fiber Membrane Materials and Processes School of Environmental and Chemical EngineeringTianjin Polytechnic UniversityTianjin 300387China CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety National Center for Nanoscience and TechnologyNo.11 BeiyitiaoZhongguancunHaidian DistrictBeijing 100190China

Photoacoustic imaging(PAI)is an emerging whole-body imaging modality offering high spatial resolution,deep penetration and high contrast in *** for PAI are generated from contrast agents,where the laser-gen-erated optical energy is transferred to acoustic emissions and detected by an ultrasound transducer.A great deal of research over the past ten years has shown that near-infrared absorption nanomaterials such as organic dye-based nanoparticals,polymer-based nanoparticles,carbon-based nanomaterials and metallic nanomaterials are promising photoacoustic(PA)contrast agents,which can increase the imaging resolution,contrast and depth of ***,it is an attractive research field to develop new PA contrast ***,we reviewed this rapidly grow-ing field and described the applications of nanomaterial-based PA contrast agents for biomedical ***-lar focus was given to organic near-infrared absorbing dyes including cyanine,porphyrin and boron-dipyrromethene derivatives.

关键词： nanomaterials photoacoustic imaging near-infrared contrast agent dye derivatives

Hollow Zn/Co zeolitic imidazolate framework-implanted composite hydrogel for highly efficient uranium extraction from seawater

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Nano Research 2023年第7期16卷 10451-10461页

作者： Yucheng Song Xin Ma Huanhuan Tan Zhong Liu Chuntai Liu Changyu Shen peipei yang Songwei Li National Engineering Research Center for Advanced Polymer Processing Technology Key Laboratory of Materials Processing and Mold(Ministry of Education)Zhengzhou UniversityZhengzhou 450002China Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources Qinghai Provincial Key Laboratory of Resources and Chemistry of Salt LakesQinghai Institute of Salt LakesChinese Academy of SciencesXining 810008China Henan Tuoren Medical Device Co. Ltd.Weiyuan Industrial ParkChangyuan 453400China

Efficient capture of uranium(VI)(U(VI))from seawater is of great significance to the sustainable development of nuclear energy and environmental protection,which is also a serious challenge at *** this study,hollow Zn/Co zeolitic imidazolate framework(H-ZIF)was decorated on polyacrylamide/sodium alginate(PAM/SA)hydrogel by chelating and covalently crosslinking,and a new type of PAM/SA/H-ZIF hydrogel was *** combination of PAM/SA and H-ZIF gives PAM/SA/H-ZIF hydrogel excellent mechanical properties,good stability,and abundant surface functional groups,which is beneficial to improving the adsorption *** extraction amount of U(VI)by PAM/SA/H-ZIF is 171.14 mg·g^(-1)at C_(0)=99.52 mg·L^(-1)and pH=*** adsorption equilibrium is reached in 120 min and the adsorption process fits well with Langmuir isotherm model and pseudo-second-order rate *** PAM/SA/H-ZIF also showed good recyclability and stability after 10 cycles of *** importantly,the rate of uranium adsorption is 0.196 mg·g^(-1)·day^(-1)after 30 days,which implies that the PAM/SA/H-ZIF could serve as a potential adsorbent for the development of uranium capture from seawater.

关键词： hydrogel hollow metal-organic framework uranium capture seawater

Assembly of a core–shell MOF with stability into polyacrylamide hydrogel for boosting extraction of uranium from seawater

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Nano Research 2024年第4期17卷 3398-3406页

作者： Yucheng Song Huanhuan Tan Shiliang Qin Zhong Liu Chuntai Liu Changyu Shen peipei yang Songwei Li National Engineering Research Center for Advanced Polymer Processing Technology Key Laboratory of Materials Processing and Mold(Ministry of Education)Zhengzhou UniversityZhengzhou 450002China Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources Qinghai Provincial Key Laboratory of Resources and Chemistry of Salt LakesQinghai Institute of Salt LakesChinese Academy of SciencesXining 810008China

Efficient and selective extraction of uranium(U(VI))from seawater is essential for sustainable nuclear power *** study reports a novel adsorbent zeolitic imidazolate framework(ZIF)-67@SiO_(2)-A/polyacrylamide(PAM)which was synthesized by grafting the core–shell metal–organic frameworks(MOFs)-based nanostructures coated with the 3-aminopropyl triethoxysilane(APTES)functionalized SiO_(2)(SiO_(2)-A)onto PAM *** SiO_(2) shell was grown on the surface of MOF,which improved the acid-base resistance of *** introduction of ZIF-67@SiO_(2)-A enhances the specific surface area and adsorption efficiency of the *** ZIF-67@SiO_(2)-A/PAM shows remarkable adsorption capacity,fast adsorption kinetics,and good reusability for *** has excellent adsorption property(6.33 mg·g^(-1),30 d)in natural *** X-ray photoelectron spectroscopy(XPS),Fourier transform infrared(FTIR),energy dispersive spectroscopy(EDS)mappings,and density functional theory reveal that the coordination by N and O in ZIF-67@SiO_(2)-A/PAM with uranium is the main mechanism of uranium ***,ZIF-67@SiO_(2)-A/PAM has great potential to capture uranium from natural seawater.

关键词： hydrogel metal–organic frameworks core–shelled nanostructures uranium extraction from seawater