Review
Chemistry, Multidisciplinary
Tianjia Yang, Yuxuan Li, Zihao Zhao, Wang Zhang Yuan
Summary: Nonconventional luminophores have unique photophysical properties and potential applications in various fields, including fluorescence, phosphorescence, and color tunable room temperature phosphorescence (RTP). This article summarizes recent advances in the phosphorescence of nonconventional luminophores, with a focus on RTP and color tunable RTP. The clustering-triggered emission (CTE) mechanism is applied to explain luminescence as clustering-triggered phosphorescence (CTP).
SCIENCE CHINA-CHEMISTRY
(2023)
Review
Chemistry, Multidisciplinary
Saixing Tang, Tianjia Yang, Zihao Zhao, Tianwen Zhu, Qiang Zhang, Wubeiwen Hou, Wang Zhang Yuan
Summary: Nonconventional luminophores, lacking extended conjugates, have unique luminescence properties and applications in various fields. These unconventional luminophores possess nonconjugated structures and exhibit intriguing luminescence behaviors.
CHEMICAL SOCIETY REVIEWS
(2021)
Article
Nanoscience & Nanotechnology
Biao Zhao, Shenghua Yang, Xueyong Yong, Jianping Deng
Summary: The study presents a simple strategy to achieve ultralong RTP emission in biobased nonconjugated polymers through a hydrolyzation process. The polymers synthesized exhibit enhanced blue emission and persistent RTP, with reversible emission performance regulated by cations or substituents. The obtained polymers show potential applications in anticounterfeiting and information encryption.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Polymer Science
Mengdie Zhou, Jiafan Zhang, Yueyue Chen, Zhong Chen, Yongjie Yuan, Yongyang Gong, Hailiang Zhang
Summary: In this study, chiral liquid crystals were used to obtain circularly polarized luminescence (CPL) materials with high dissymmetry factor (glum) values. PM6Chol-coated film exhibited efficient CPL due to the helical arrangement of cholesterol, while PM6Chol thermal-treated film showed no CPL signal but demonstrated room-temperature phosphorescence.
MACROMOLECULAR RAPID COMMUNICATIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Hui Liu, Kun Zhang, Peng-Fu Gao, Jia-Hua Luo, Yu-Ying Jiang, Meng-Shu Zhou, Ting Li, Xue-Li Zhu, Hong-Ru Fu
Summary: Two Cd-based supramolecular coordination polymers with multiple luminescence emissions, including fluorescence and time- and temperature-dependent ultralong phosphorescence, have been successfully synthesized. One of the compounds exhibits a long-lived afterglow under ambient conditions, while the other shows nearly pure white-light emission. This is the first example of a luminescent coordination polymer with single-phase white-light emission and color-evolution RTP.
INORGANIC CHEMISTRY
(2022)
Review
Chemistry, Multidisciplinary
Nan Jiang, Dongxia Zhu, Zhongmin Su, Martin R. Bryce
Summary: Nonconventional chromophores, lacking classic conjugation and rigid structures, are a popular research topic in luminescent materials due to their unique and under-explored fundamental properties and promising applications. However, the structural design and photoluminescence mechanism in these materials are still unclear and controversial. Different luminescence mechanisms have been proposed in recent years, providing opportunities for new materials synthesis.
MATERIALS CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Multidisciplinary
Zi-Ang Yan, Xiaohan Lin, Siyu Sun, Xiang Ma, He Tian
Summary: This study introduces a new general strategy for designing and developing pure organic RTP materials starting from an existing library of organic dyes without the need for complicated chemical synthesis.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Marina S. Fonari, Victor Ch Kravtsov, Victor Bold, Elena Lucenti, Elena Cariati, Daniele Marinotto, Alessandra Forni
Summary: Various Zn(II) and Cd(II) coordination compounds with different metal/luminophore/anion/water ratios were synthesized in solvothermal conditions. The coordination compounds with L-1 and L-2 as inner-sphere ligands were structurally characterized, including inclusion compounds, supramolecular isomers, isomorphs, polymorphs, and one-dimensional coordination polymers. The crystal structures showed finite and infinite stacking motifs of the luminophore molecules, leading to an emissive response under UV-vis lamp irradiation.
CRYSTAL GROWTH & DESIGN
(2021)
Review
Chemistry, Multidisciplinary
Peilong Liao, Jianbin Huang, Yun Yan, Ben Zhong Tang
Summary: Clusterization-triggered emission (CTE) is a photophysical phenomenon that allows for highly efficient light emission from non-conjugated molecules. Applications of CTE include optical anti-counterfeiting, white LED materials, bioimaging, and molecular sensing. In the future, CTE may revolutionize the design of advanced functional luminescent materials.
MATERIALS CHEMISTRY FRONTIERS
(2021)
Article
Polymer Science
Jingfei Wang, Lifeng Xu, Shuangling Zhong, Yongyan Yang, Gangying Feng, Qingye Meng, Yan Gao, Xuejun Cui
Summary: This study reports the unique intrinsic emission of PVA and explains the emission with the clustering-triggered emission (CTE) mechanism. Due to its excellent biocompatibility and ability to form films and hydrogels, PVA has great potential for practical applications.
Letter
Materials Science, Multidisciplinary
Jun-Cheng Yang, Zhiyuan Fu, Huili Ma, Tao Wang, Kai Wang, Lin Wu, Ben Zhong Tang, Hai-Tao Feng, Pu Chen, Qiuying Li
Summary: This study focuses on the stimuli-responsive luminescence of a novel emitter, DCzPy, which emits bluegreen fluorescence in crystal form. Upon gentle grinding, the fluorescence intensity of DCzPy is significantly enhanced with a hypsochromic shift. The emission wavelength returns to its original value after heavy grinding. Moreover, DCzPy exhibits a large bathochromic-shifted and weakened fluorescence under isotropic compression. In film form, the thermoresponsive behavior of DCzPy changes the emission from green to blue. Based on this thermo-induced fluorescence switching, a two-dimensional code for information anticounterfeiting is successfully fabricated.
ACS MATERIALS LETTERS
(2023)
Article
Chemistry, Applied
Dan Hong, Xian-yue Xiang, Qiu-ju Zhou, Yu-Lin Zhu, Yong-ping Wu, Jun Yang, Shi-hong Chen, Ke-jun Tan
Summary: In this study, multi-emission carbon dots (M-CDs) with three emissions were synthesized and their luminescence mechanism was investigated in detail. The high-concentration M-CDs showed emissions at 423 nm and 586 nm, while the emission at 493 nm was mainly due to self-absorption. On the other hand, low-concentration M-CDs only had emissions at 423 nm and 586 nm. Solid CDs (S-CDs) with solid-state room temperature phosphorescence (RTP) were also obtained, and their mechanism was found to be related to the presence of NaHCO3 acting as an oxygen barrier. The M-CDs were successfully used for detecting Morin, while the S-CDs were applied for optical anti-counterfeiting purposes.
Article
Chemistry, Multidisciplinary
Tianjia Yang, Wubeiwen Hou, Wang Zhang Yuan
Summary: This study focuses on bis(pinacolato)diboron (BE1) and its analogue bis(2,4-dimethylpentane-2,4-glycolato)diboron (BE2), which are nonemissive in dilute solutions but show remarkable photoluminescence at aggregate states. The photoluminescence of these compounds can be easily tuned by external factors such as excitation wavelength, compression, and oxygen. The clustering-triggered emission (CTE) mechanism can explain these photophysical properties well.
CHEMISTRY-AN ASIAN JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Peilong Liao, Tongyue Wu, Cheng Ma, Jianbin Huang, Yun Yan
Summary: Clusterization-triggered emission (CTE) is a powerful strategy for achieving useful luminescence, such as room-temperature phosphorescence (RTP). However, the recognition of CTE-RTP is still limited. In this study, the authors demonstrate phosphorescence resonance energy transfer (PRET) in the CTE-RTP system, allowing precise control over the color of the emission. PRET can occur between CTE-RTP and fluorescent dyes, resulting in delayed fluorescence spanning from green to near infrared. This system enables facile achievement of dynamic afterglow, making it highly appealing for anticounterfeiting applications.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Hai-Feng He, Jia-Kun Zhang, Xiao-Yun Wu, Feng Zhao, Yu-Zhen Huang, Ming-Cong Wang, Chao-Xuan Feng, De-Rui Mao, Xue-Long Huang, Yi-Fan Hu
Summary: Six phosphorescence-emitting metal-organic mononuclear Cu(i) complexes, including four quinoline-containing three-coordinate Cu(i) complexes and two N-heterocyclic carbene-containing four-coordinate Cu(i) complexes, have been developed and characterized. The solid samples of these Cu(i) complexes emit different phosphorescence and their solid-state phosphorescence can be manipulated by external mechanical force. The reversible mechanically induced phosphorescence changes of these complexes are due to the transformation between ordered crystalline and metastable amorphous states.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Yuan Guo, Lingyun Zhu, Ruihong Duan, Guangchao Han, Yuanping Yi
Summary: Low energy loss is crucial for high photovoltaic efficiency in organic solar cells. In this Concept article, we summarize recent theoretical advances in understanding the energy loss mechanisms of A-D-A electron acceptors at the molecular level. We emphasize the importance of electron-vibration coupling in reducing energy loss and describe effective molecular design strategies to achieve low energy loss by decreasing electron-vibration couplings.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Xiaoxin Zheng, Quanxiang Han, Qinglian Lin, Cuicui Li, Jinke Jiang, Qing Guo, Xin Ye, Wang Zhang Yuan, Yang Liu, Xutang Tao
Summary: This study demonstrates the high-performance of pure polymer-PAH materials with long-lived room-temperature phosphorescence, which can be used in various applications and fabricated through diverse methods. Their environmental stability makes them a promising option in the field of organic RTPs.
MATERIALS HORIZONS
(2023)
Article
Chemistry, Organic
Wansong Shang, Guangchao Han, Qingrui Fan, Xiaobo Yu, Dongsheng Liu, Cheng Li, Xi-Sha Zhang, Yuanping Yi, Guanxin Zhang, Deqing Zhang
Summary: In this paper, a new quinoid molecule with a long conjugation length is synthesized and found to exhibit strong absorption in the near-infrared region. The thin film of this molecule shows balanced ambipolar semiconducting properties with high hole and electron mobilities.
ORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Energy & Fuels
Wenyu Zheng, Guangchao Han, Yuanping Yi
Summary: Double-cable polymers (DCPs) with donors and acceptors in the same molecular matrix exhibit excellent stability and have great potential in the practical application of organic solar cells (OSCs). By introducing twisted dimeric rylene diimides, the number of neighbors and connectivity for the acceptors can be significantly increased. Tuning the dimerization ratio can achieve donor:acceptor bicontinuous networks.
Article
Multidisciplinary Sciences
Usman Ali, Guangchao Han, Yuanping Yi
Summary: The impact of connection modes between donor and acceptor on the luminescence properties of organic emitters based on TPA and PAQ is revealed. Single bond connection leads to thermally activated delayed fluorescence, while a benzene ring connection enhances room temperature phosphorescence. Furthermore, changing the connection position can facilitate both thermally activated delayed fluorescence and room temperature phosphorescence.
ADVANCED THEORY AND SIMULATIONS
(2023)
Article
Chemistry, Multidisciplinary
Jie Xue, Jingyi Xu, Qingxin Liang, Yu Dai, Rui Wang, Yuanping Yi, Juan Qiao
Summary: This study investigates the aggregation effect of intermolecular charge-transfer aggregates (CTA) for high-efficiency near-infrared organic light-emitting diode (OLED). Two CTA molecules with the same pi-framework but different terminal substituents are developed to reveal the influence of molecular packing on photophysical properties. In the amorphous state, both CTA molecules exhibit similar behaviors and properties, leading to multifunction improvements in non-doped OLEDs with high-efficiency NIR emissions and low efficiency roll-off.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Liyuan Qin, Yan-Ying Huang, Botao Wu, Jinliang Pan, Junfang Yang, Jing Zhang, Guangchao Han, Suyu Yang, Liangliang Chen, Zheng Yin, Yilin Shu, Lang Jiang, Yuanping Yi, Qian Peng, Xiong Zhou, Cheng Li, Guanxin Zhang, Xi-Sha Zhang, Kai Wu, Deqing Zhang
Summary: Non-benzenoid polycyclic aromatic hydrocarbons (PAHs) have unique properties and synthesis challenges. We report the synthesis of a non-benzenoid isomer, diazulenorubicene (DAR), which contains two sets of 5/7/5 membered rings. The newly formed five membered rings switch the aromaticity and result in p-type semiconducting properties in compound DAR-TMS. Further extension to larger non-benzenoid PAHs with 19 rings was achieved through on-surface chemistry.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Tianjia Yang, Wubeiwen Hou, Wang Zhang Yuan
Summary: This study focuses on bis(pinacolato)diboron (BE1) and its analogue bis(2,4-dimethylpentane-2,4-glycolato)diboron (BE2), which are nonemissive in dilute solutions but show remarkable photoluminescence at aggregate states. The photoluminescence of these compounds can be easily tuned by external factors such as excitation wavelength, compression, and oxygen. The clustering-triggered emission (CTE) mechanism can explain these photophysical properties well.
CHEMISTRY-AN ASIAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Fanyi Min, Zhao-Yang Zhang, Zhiyuan Qu, Jie Gao, Xiaosong Shi, Haoran Long, Yixin Li, Shengnan Chen, Dongfang Dong, Yuanping Yi, Lang Jiang, Juehan Yang, Tao Li, Yali Qiao, Yanlin Song
Summary: Humidity plays a critical role in molecular assembly, forming microscale liquid confined space under high humidity and nanoscale liquid confined space under low humidity. The differences in surface wettability and adhesion are important. The study reveals that flat patterns with thermodynamically ordered structure and sharp patterns with dynamically disordered structure show different photoisomerization behaviors and photoresponsiveness. The sharp pattern with disordered structure has higher conductivity than the flat pattern with layered ordered structure due to different electronic transport mechanisms. This work provides a new approach for controlling the morphology and function of molecular patterns through manipulating molecular self-assembly.
Article
Chemistry, Multidisciplinary
Liangliang Chen, Zhengsheng Qin, Han Huang, Jing Zhang, Zheng Yin, Xiaobo Yu, Xi-sha Zhang, Cheng Li, Guanxin Zhang, Miaofei Huang, Huanli Dong, Yuanping Yi, Lang Jiang, Hongbing Fu, Deqing Zhang
Summary: A new design strategy is reported for highly emissive ambipolar and n-type organic semiconductors by introducing perfluorophenyl groups into polycyclic aromatic hydrocarbons. The results show that 3,9-diperfluorophenyl perylene exhibits ambipolar semiconducting property and a photoluminescence quantum yield of 55%. Crystals of 5FDPP also display blue emission and the highest electron mobility among reported organic emissive n-type semiconductors. Furthermore, OLETs fabricated using 5FDPP crystals achieve high electroluminescence efficiency and current density.
Article
Chemistry, Physical
Tianwen Zhu, Shuyuan Zheng, Tianjia Yang, Wang Zhang Yuan
Summary: In this study, the co-crystallization between melamine and cyclic imide-based non-conventional luminophores is reported. The resulting co-crystals have multiple hydrogen bonds and effective clustering of electron-rich units, leading to diverse emissive species with rigid conformations and promoted spin-orbit coupling. As a result, p-RTP co-crystals with enhanced efficiencies and lifetimes of up to 12.0% and 898 ms, respectively, are obtained, along with improved color tunability. These findings may contribute to the rational design of high-performance p-RTP materials and advance our understanding of the mechanism behind color-tunable phosphorescence.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Yuanyuan Qin, Xin Xie, Zhi Pang, Guanhao Liu, Xiangyu Dong, Shaogang Shen, Yaogang Zhang, Chun-Sing Lee, Yuanping Yi, Pengfei Wang, Ying Wang
Summary: The study demonstrates that deuterating green TADF emitters containing aromatic ketones can decrease non-radiative decay rates and increase the reverse intersystem crossing rate, resulting in high-performance TADF emitters.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Physical
Chunguang Ren, Zhengshuo Wang, Hanlin Ou, Tianjie Wang, Zhipeng Zhao, Yuting Wei, Hua Yuan, Yeqiang Tan, Wang Zhang Yuan
Summary: A kind of amorphous RTP material with ultralong lifetime is fabricated by covalently bonding sodium alginate with arylboronic acid in aqueous phase. The resulting polymer film exhibits distinctive RTP performance with excitation-dependent emissions from cyan to green. These smart materials are successfully applied in data encryption and anti-counterfeiting due to the color-tunable and stimuli-responsive afterglows.
Article
Materials Science, Multidisciplinary
Xiaosong Shi, Yanan Sun, Jie Liu, Yicai Dong, Yanjun Shi, Yuanping Yi, Lang Jiang
Summary: A series of novel asymmetric anthracene derivatives, including 5-BTA, 5-BTVA, and 5-BTEA, were synthesized. These compounds form head-head bilayer stacking and herringbone packing structures. The vinyl-bridged 5-BTVA shows stronger intra-layer intermolecular interactions, suitable thickness for transistor construction (<50 nm), and significantly higher hole mobility and energy level alignment compared to 5-BTA and 5-BTEA. The temperature-dependent device physics studies reveal its low trap density and low activation energy characteristics.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Minchao Li, Jin Guo, Chuang Zhang, Yanke Che, Yuanping Yi, Bing Liu
Summary: In this study, a highly efficient stabilizer-assisted liquid-crystallization-driven self-assembly strategy was developed to synthesize monodisperse colloidal polymer rods with tunable size and aspect ratios. The resulting rods exhibit unusual photo-induced fluorescence enhancement and accompanying memory effect, making them attractive for information encryption/decryption of paper documents.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)