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Construction of authentication codes with distrust arbitration from polynomials over finite fields

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The Journal of China Universities of Posts and Telecommunications 2017年第1期24卷 87-95页

作者： Chen Shangdi tian wenjing Li Xue College of Science Civil Aviation University of China Tianjin 300300 China

The authentication codes with arbitration are able to solve dispute between the sender and the receiver. The authentication codes with trusted arbitration are called AZ-codes, the authentication codes with distrust arbitration are called A3-codes . As an expansion of Az-cOdes , an A3-code is an authentication system which is closer to the reality environment. Therefore, A3-codes have more extensive application value. In this paper, we construct a class of A3-codes based on polynomials over finite fields, give the parameters of the constructed codes, and calculate a variety of cheating attacks the maximum probabilities of success. Especially, in a special case, the constructed A3-codes are perfect. Compared with a known type of codes, they have almost the same security level, however, our codes need less storage requirements. Therefore, our codes have more advantages.

关键词： authentication code distrust arbitration polynomial finite field perfect

Recent Advances in Mechanism of AIE Mechanochromic Materials

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Chemical Research in Chinese Universities 2021年第1期37卷 100-109页

作者： WANG Lipeng LIU Leijing XU Bin tian wenjing State Key Laboratory of Supramolecular Structure and Materials Jilin UniversityChangchun130012P.R.China

Organic mechanochromic materials(also known as piezochromic materials),whose color or emission changes under mechanical force,have attracted great interest owing to their potential applications in pressure sensors,rewritable materials,optical storage,and security *** mechanochromic materials with aggregation-induced emission(AIE)features have better development prospects and research value owing to their excellent optical *** date,mechanochromism has mostly been realized by means of mechanical ***,the magnitude of the grinding force is usually uncontrollable and its direction is anisotropic,making it awkward to study the mechanism of mechanochromic *** the contrary,hydrostatic pressure,whose magnitude and direction are controllable,is a more valid and governable method to investigate the mechanism of mechanochromic materials,which can help us to construct a meaningful structure-property relationship and understand the latent origin of the ***,it is conducive to developing other mechanochromic material systems with desired chemical and physical *** this review,we focus on the recent progress in the mechanism of organic mechanochromic materials with AIE features under hydrostatic *** types of mechanisms are included:intermolecular interaction change,intramolecular conformation change,transformation from locally excited state to intramolecular charge-transfer state,and intra-and inter-molecular effects induced by hydrostatic pressure,respectively.

关键词： Aggregation-induced emission Mechanism Mechanochromic Hydrostatic pressure

A Label-free Fluorescent Aptasensor for Turn-on Monitoring Ochratoxin A Based on AIE-active Probe and Graphene Oxide

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Chemical Research in Chinese Universities 2018年第3期34卷 363-368页

作者： MA Lian XU Bin LIU Leijing tian wenjing State Key Laboratory of Supramolecular Structure and Materials Jilin University Changehun 130012 P. R. China

A label-free fluorescent aptasensor for specific and ultrasensitive monitoring ochratoxin A（OTA） was developed using the specific aptamer of OTA（OSA） as recognition dement, an aggregation-induced emission（AIE） molecule（a 9,10-distyrylanthracene with two ammonium groups, DSAI） as a fluorescent probe, and graphene oxide（GO） as a quencher. In the absence of OTA, the AIE probe DSAI and OSA complex（DSAI/OSA） is adsorbed on the GO surface, and the fluorescence of DSAI will be quenched efficiently via the fluorescence resonance energy transfer（FRET） from DSAI to GO. Upon the OTA addition, a more stable complex（OSA-OTA） is formed and released from GO. Meanwhile, DSAI and OSA-OTA can form a new complex（DSAI/OSA-OTA）, then the fluorescent signal of DSAI recovers gradually. Therefore, by introducing GO and DSAI, the fluorescence signal of DSAI can be easily turned from ＂off＂ to ＂on＂ after the addition of OTA, and the ultrasensitive detection of OTA by monitoring the change of the fluorescence signal of DSAI can be readily realized. The detection limit of the assay can reach 0.324 nmol/L with a linear detection range of 10-200 nmol/L. And the aptasensor exhibits high selectivity for OTA against other analogues. Moreover, it has been successfully applied for the detection of OTA in red wine samples.

关键词： Label-free Aptasensor Aggregation-induced emission(AIE)-active probe Graphene oxide Ochratoxin A

Synthesis, Characterization and Properties of Novel Star-Shaped π-Conjugated Oligomers with Triphenylamine Core

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Chinese Journal of Chemistry 2013年第4期31卷 456-464页

作者： Leijing Liu Qing Guo Jiyang Li Bin Yao wenjing tian State Key Laboratory of Supramolecular Structure and Materials Jilin University Changehun Jilin 130012 China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University Changehun Jilin 130012 China Key Laboratory of Physics and Technology for Advanced Batteries Ministry of Education Jilin University Changchun Jilin 130012 China

Four new star-shaped π-conjugated oligomers （TPA-CZ3, TPA-TPA3, TPA-PTZ3 and TPA-BT3） with triphenylamine as a core and different electron-donating ability groups, carbazole, triphenylamine, phenothiazine and bithiophene, as peripheral units have been designed and synthesized via the Heck reaction. These oligomers show good solubility in common organic solvents. Their photophysical, electrochemical, electronic structure and charge transfer properties between these star-shaped n-conjugated oligomers and N,N＇-bis（1-ethylpropyl）-3,4：9,10- perylene bis（tetracarboxyl diimide）（EP-PDI） have been investigated by UV-vis absorption spectra, photolumines- cence （PL） spectra, cyclic voltammetry （CV） measurement, theoretical calculations and fluorescence quenching. The results show that the absorptions and fluorescences of TPA-CZ3, TPA-TPA3 and TPA-PTZ3 are red shifted with the electron-donating ability of the peripheral unit increasing from carbazole to triphenylamine and phenothi- azine. In addition, although the bithiophene group has a weaker electron-donating ability than carbazole, triphenylamine and phenothiazine, the absorption and fluorescence of TPA-BT3 have a red shift than those of TPA-CZ3, TPA-TPA3 and TPA-PTZ3 because TPA-BT3 has a longer conjugation length than TPA-CZ3, TPA-TPA3 and TPA-PTZ3. The triphenylamine core and the peripheral units can constitute a large conjugated structure. The fluorescence quenching properties indicate that efficient charge transfer can happen between the star-shaped oligomers and EP-PDI.

关键词： triphenylamine star-shaped oligomer synthesis design electron-donor ability conjugation length

Charge-carrier photogeneration and extraction dynamics of polymer solar cells probed by a transient photocurrent nearby the regime of the space charge-limited current

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Frontiers of Chemical Science and Engineering 2021年第1期15卷 164-179页

作者： Boa Jin Hyunmin Park Yang Liu Leijing Liu Jongdeok An wenjing tian Chan Im Department of Chemistry Konkuk UniversitySeoul 05029Republic of Korea State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012China

To understand the complex behaviors of photogenerated charge carriers within polymer-based bulk-heterojunction-type solar cells,the charge-carrier photogeneration and extraction dynamics are simultaneously estimated using a transient photocurrent technique under various external-bias voltages,and a wide range of excitation intensities are *** this purpose,conventional devices with 80 nm thick active layers consisting of a blend of representative P3HT and PTB7 electron-donating polymers and proper electron-accepting fullerene derivatives were *** the correction for the saturation behavior at a high excitation-intensity range nearby the regime of the space charge-limited current,the incident-photon-density-dependent maximum photocurrent densities at the initial peaks are discussed as the proportional measures of the charge-carrier-photogeneration *** comparing the total number of the extracted charge carriers to the total number of the incident photons and the number of the initially photogenerated charge carriers,the external quantum efficiencies as well as the extraction quantum efficiencies of the charge-carrier collection during a laser-pulse-induced transient photocurrent process were ***,the charge-carrier concentration-dependent mobility values were obtained,and they are discussed in consideration of the additional influences of the charge-carrier losses from the device during the charge-carrier extraction that also affects the photocurrent-trace shape.

关键词： charge-carrier photogeneration transient photocurrent polymer solar cells charge-carrier extraction space charge-limited current

Long-lasting photoluminescence quantum yield of cesium lead halide perovskite-type quantum dots

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Frontiers of Chemical Science and Engineering 2021年第1期15卷 187-197页

作者： Yonghyun Kim Huiwen Liu Yi Liu Boa Jin Hao Zhang wenjing tian Chan Im Department of Chemistry Konkuk UniversitySeoul 05029Korea State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012China

Cesium lead halide perovskite(CsPbX_(3),X=Cl,Br,I)quantum dots(QDs)and their partly Mn^(2+)-substituted QDs(CsPb1–xMnxX3)attract considerable attention owing to their unique photoluminescence(PL)*** two types of QDs,having different PL decay dynamics,needed to be further investigated in a form of aggregates to understand their solid-state-induced exciton dynamics in conjunction with their behaviors upon degradation to achieve practical applications of those promising ***,thus far,these QDs have not been sufficiently investigated to obtain deep insights related to the long-term stability of their PL properties as aggregated ***,in this study,we comparatively examined CsPbX_(3)-and CsPb1–xMnxX_(3)-type QDs stocked for>50 d under dark ambient conditions by using excitation wavelength-dependent PL quantum yield and time-resolved PL *** investigations were performed with powder samples in addition to solutions to determine the influence of the inter-QD interaction of the aged QD aggregates on their radiative *** turns out that the Mn^(2+)-substituted QDs exhibited long-lasting PL quantum efficiencies,while the unsubstituted CsPbX_(3)-type QDs exhibited a drastic reduction of their PL *** the obtained PL traces were clearly sensitive to the sample *** is discussed with the possible interaction depending on the size and distance of the QD aggregates.

关键词： quantum dots cesium lead halide perovskite time-resolved photoluminescence PL quantum yield QD aggregates

A highly sensitive “turn-on” fluorescent probe for bovine serum albumin protein detection and quantification based on AIE-active distyrylanthracene derivative

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Science China Chemistry 2013年第9期56卷 1234-1238页

作者： WANG ZiLong MA Ke XU Bin LI Xing tian wenjing State Key Laboratory of Supramolecular Structure and Materials Jilin University

A sulfonated 9,10-distyrylanthracene derivative with aggregation-induced emission (AIE) property is designed and synthesized. It shows a highly sensitive and selective fluorescence enhancement property for bovine serum albumin (BSA) protein detection and quantification. Analysis on the interaction between the probe molecule and BSA reveals the essential role of the hydrophobic cavities of the protein folding structure.

关键词： aggregation-induced emission fluorescent probe distyrylanthracene derivative

Solid-State Luminescent Molecular Photoswitches

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Accounts of Materials Research 2023年第4期4卷 311-322页

作者： Xuanhang Wang Bin Xu wenjing tian State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012China

CONSPECTUS:Molecular photoswitches with drastically switchable luminescent properties have attracted increasing attention due to their unique advantages in nondestructive and high-contrast read-out systems,which feature promising applications in optoelectronic devices,data storage,and optical *** general,common organic photoswitches,capable of undergoing reversible structural changes between two photoisomers in solution state,exhibit markedly different optical properties in response to light ***,the photoisomerization dynamics in solid state are often severely inhibited due to the close molecular stacking that limits their structural transformation,resulting in the absence of functionality or the negative implication in practical *** address this issue,photoswitches have been introduced into various porous platforms to overcome molecular crowding and acquire sufficient conformational freedom for photoisomerization in condensed ***,the realization of solid-state photoisomerization in the single-component molecular system remains extremely difficult,probably arising from the difficulties of structural modification and molecular-packing *** importantly,exploring the solid-state switchable luminescent properties of photoswitch materials is highly challenging for molecular design and functional integration,which should not only fulfill the requirement of conformational freedom for efficient photoisomerization but also need to regulate the excited-state dynamics *** this Account,we present the recent progress of our research groups in the development of solid-state luminescent molecular photoswitches,mainly focusing on molecular design strategy,switchable luminescence,and potential *** the beginning of our research,we proposed a new approach to implementing solid-state photoinduced luminescence switching and optical *** a flexible covalent coupling strategy,we incorporated twis

关键词： reversible luminescence Molecular

Theoretical Study of Electronic Structures and Charge Transport Properties of 9,10-Bis（（E）-2-（pyrid-n-yl） vinyl）（n=2, 3, 4） Anthracene

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Chinese Journal of Chemistry 2015年第8期33卷 974-980页

作者： Qing Guo Lijuan Wang Yuanfei Jiang Jing Guo Bin Xu wenjing tian State Key Laboratory of Supramolecular Structure and Materials Jilin University Changchun Jilin 130012 China School of Materials Science and Engineering Harbin Institute of Technology at Weihai Weihai Shandong 264209 China Institution of Atomic and Molecular Physics Jilin University Changchun Jilin 130012 China

Charge carrier mobility is one of the most significant properties for organic semiconductors. In this work, the electronic structures and charge transport properties of 9,10-bis（（E）-2-（pyrid-n-yl）vinyl）（n=2, 3, 4） anthracene （BP2VA, BP3VA and BP4VA） were investigated via the analysis of the molecular geometry, the reorganization en- ergy, the frontier orbital and density of state, as well as the electronic coupling and the charge mobility. The results indicated that the linkage between 9,10-divinyl anthracene unit and pyridine （ortho-, meta- and para-） influenced not only the intra-molecular conformation （i.e., the reorganization energies）, but also the intermolecular interaction （i.e., transfer integrals）, and finally the charge mobility of the molecules. It is also found that：（1） The calculated charge mobilties of holes are dozens of times higher than those of electrons for the three molecules. （2） The charge mobilities of hole and electron of the three molecules display the trend： μBP4VA〉μBPZVA〉μBP3VA, and the hole mobility of BP4VA is as high as as-cm^2/（V·s）.

关键词： charge mobility reorganization energy electronic structure