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Start Over Author "Zhang, Haoke" Journal angewandte chemie international edition
16 results on '"Zhang, Haoke"'

7. Altering Chain Flexibility of Aliphatic Polyesters for Yellow‐Green Clusteroluminescence in 38 % Quantum Yield.

Author

Chu, Bo, Zhang, Haoke, Hu, Lanfang, Liu, Bin, Zhang, Chengjian, Zhang, Xinghong, and Tang, Ben Zhong

Subjects
*POLYESTERS, *DETECTION limit, *IRON clusters, *POLYMERS
Abstract

Preparation of non‐conjugated polymers with long‐wavelength emission and high quantum yield (QY) is still a huge challenge. Herein, we report the first example of linear non‐conjugated polyester exhibiting yellow–green clusteroluminescence (CL) and a high QY of 38 %. We discovered that the polyester P3 with balanced flexibility and rigidity showed the longest CL wavelength and highest QY. Systematically photophysical characterization unravel the key role of ester cluster in the CL and the cluster formation via the aggregate of ester units was visualized. Moreover, P3 was demonstrated to be a highly selective, quick‐responsive (ca. 1.2 min) and sensitive detector (detection limit is 0.78 μM) for irons owing to the fast disassociation of clusters by irons. This work not only gains further mechanistic insight into CL but also provides a new strategy to design high‐efficiency and long‐wavelength CL, meanwhile, enlightens the glorious application prospect of luminescent polyester. [ABSTRACT FROM AUTHOR]

Published
2022
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8. ACQ‐to‐AIE Transformation: Tuning Molecular Packing by Regioisomerization for Two‐Photon NIR Bioimaging

Author

Li, Yuanyuan, primary, Liu, Shunjie, additional, Ni, Huwei, additional, Zhang, Haoke, additional, Zhang, Hequn, additional, Chuah, Clarence, additional, Ma, Chao, additional, Wong, Kam Sing, additional, Lam, Jacky W. Y., additional, Kwok, Ryan T. K., additional, Qian, Jun, additional, Lu, Xuefeng, additional, and Tang, Ben Zhong, additional

Published
2020
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11. Chemiluminescence Resonance Energy Transfer Efficiency and Donor–Acceptor Distance: from Qualitative to Quantitative.

Author

Lou, Jinhui, Tang, Xiaofang, Zhang, Haoke, Guan, Weijiang, and Lu, Chao

Subjects
FLUORESCENCE resonance energy transfer, CHEMILUMINESCENCE, DISTANCES, CATIONIC surfactants, POWER (Social sciences)
Abstract

Since its birth in 1967, the utilization of chemiluminescence resonance energy transfer (CRET) has made substantial progress in a variety of fields for its unique features. However, the quantitative relationship between CRET efficiency and donor–acceptor distance has not yet been determined owing to the difficulty in designing the variable lengths between chemiluminescent donors and acceptors. Herein, we synthesized three kinds of tetraphenylethene (TPE)‐anchored cationic surfactants with aggregation‐induced emission (AIE) characteristics. For the first time, it is quantitatively demonstrated that the CRET efficiency is inversely proportional to the sixth power of distance between luminol donors and TPE acceptors. The details disclosed in this contribute have provided the solid evidence that CRET follows Förster resonance theory. Our strategy would build a promising platform to control donor–acceptor distance, allowing to the interdisciplinary applications of CRET. [ABSTRACT FROM AUTHOR]

Published
2021
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15. New Wine in Old Bottles: Prolonging Room‐Temperature Phosphorescence of Crown Ethers by Supramolecular Interactions.

Author

Wei, Peifa, Zhang, Xuepeng, Liu, Junkai, Shan, Guo‐Gang, Zhang, Haoke, Qi, Ji, Zhao, Weijun, Sung, Herman H.‐Y., Williams, Ian D., Lam, Jacky W. Y., and Tang, Ben Zhong

Subjects
WINE bottles, CROWN ethers, PHOSPHORESCENCE, SMART materials, HOST-guest chemistry
Abstract

Supramolecular macrocyclic hosts have long been used in smart materials. However, their triplet emission and regulation at crystal level is rarely studied. Herein, ultralong and universal room‐temperature phosphorescence (RTP) is reported for traditional crown ethers. A supramolecular strategy involving chain length adjustment and morphological locking through complexation with K+ was explored as a general method to tune the phosphorescence lifetime in the solid state. A maximum 10‐fold increase of lifetime after complex formation accompanied with by invisible to visible phosphorescence was achieved. A deep encryption based on this activated RTP strategy was also facilely fabricated. This work thus opens a new world for supramolecular macrocycles and their intrinsic guest responsiveness offers a new avenue for versatile smart luminescent materials. [ABSTRACT FROM AUTHOR]

Published
2020
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