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11 results on '"Ran, Guangliu"'

4. Designing high‐performance nonfused ring electron acceptors via side‐chain engineering.

Author

Zheng, Xinming, Liu, Wenlong, Wei, Nan, Zhang, Andong, Ran, Guangliu, Shan, Hongtao, Huo, Hong, Liu, Yahui, Lu, Hao, Xu, Xinjun, Tang, Zheng, Zhang, Wenkai, and Bo, Zhishan

Subjects
SOLAR cells, SHORT-circuit currents, ENGINEERING, SMALL molecules, OPTICAL properties, ELECTROPHILES, POLYMER networks
Abstract

The side‐chain has a significant influence on the optical properties and aggregation behaviors of the organic small molecule acceptors, which becomes an important strategy to optimize the photovoltaic performance of organic solar cells. In this work, we designed and synthesized three brand‐new nonfused ring electron acceptors (NFREAs) OC4‐4Cl‐Ph, OC4‐4Cl‐Th, and OC4‐4Cl‐C8 with hexylbenzene, hexylthiophene, and octyl side chains on the π‐bridge units. Compared with OC4‐4Cl‐Ph and OC4‐4Cl‐Th, OC4‐4Cl‐C8 with linear alkyl side chain has more red‐shift absorption, which is conducive to obtaining higher short‐circuit current density. Additionally, the OC4‐4Cl‐C8 film exhibits a longer exciton diffusion distance, and the D18:OC4‐4Cl‐C8 blend film displays faster hole transfer, weaker bimolecular recombination, and more efficient exciton transport. Furthermore, The D18:OC4‐4Cl‐C8 blend films may effectively form interpenetrating networks that resemble nanofibrils, which can facilitate exciton dissociation and charge transport. Finally, OC4‐4Cl‐C8‐based devices can be created a marvellously power conversion efficiency (PCE) of 16.56%, which is much higher than OC4‐4Cl‐Ph (12.29%)‐ and OC4‐4Cl‐Th‐based (11.00%) ones, being the highest PCE among the NFREA based binary devices. All in all, we have validated that side‐chain engineering is an efficient way to achieve high‐performance NFREAs. [ABSTRACT FROM AUTHOR]

Published
2024
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10. Triarylborane‐Functionalized Au8Ag8(CCR)16 Nanocluster with Enhanced Lewis Acidity.

Author

Lu, Hui, Fan, Jinsong, Ran, Guangliu, Li, Jiang, Wang, Lihua, Zhu, Ying, Shen, Jianlei, Zhang, Wenkai, Chen, Jing, and Fan, Chunhai

Subjects
LEWIS acidity, LEWIS acids, X-ray crystallography, ENERGY dissipation, SURFACE enhanced Raman effect, REDUCED instruction set computers
Abstract

Functionalization of ligated metal nanoclusters with versatile ligands is highly desired for wide applications. Lewis acids have shown promise in multiple realms such as self‐assembly and catalysis, which may endow nanoclusters with diverse functions. However, metal nanoclusters with Lewis acid surface have not been reported. Here, the functionalization of a bimetallic nanocluster Au8Ag8(CCR)16 with triarylborane (TAB) is reported, which exhibits enhanced Lewis acidity. By using single‐crystal X‐ray crystallography, the structure of the nanocluster with 16 boron receptor sites is confirmed, which presents ≈15‐fold enhancement of quenching efficiency in sensing fluoride compared to that of free triarylborane ligand. By the combined analysis using ultrafast transient absorption and photoluminescent (PL) decay measurements, the quenching mechanism of Au8Ag8 to fluoride is elucidated. The PL quenching is realized via two pathways with enhanced non‐radiation energy dissipation, i.e., prolonged electron–phonon coupling and reverse intersystem crossing (RISC). This work may open a new route to diverse applications of metal nanoclusters. [ABSTRACT FROM AUTHOR]

Published
2023
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11. Unusual near infrared (NIR) fluorescent palladium(ii) macrocyclic complexes containing M–C bonds with bioimaging capability† †Electronic supplementary information (ESI) available. CCDC 1912139–1912141. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c9sc04044g

Author

Yao, Yuhang, Hou, Chun-Liang, Yang, Zi-Shu, Ran, Guangliu, Kang, Lei, Li, Cuicui, Zhang, Wenkai, Zhang, Jing, and Zhang, Jun-Long

Subjects
inorganic chemicals, Chemistry
Abstract

NIR fluorescent palladium(ii) complexes were firstly achieved by the formation of M–C bonds and reducing the π-conjugation of macrocyclic ligands. The capability of in vitro and in vivo bioimaging has been demonstrated., Near infrared (NIR) luminescent metal complexes are promising probes in bioimaging and biosensing, however they generally suffer from oxygen interference arising from heavy metal effects. We designed new tetradentate macrocyclic benzitripyrrin (C^N^N^N) ligands by combination of M–C bond formation and reducing the π-conjugation to achieve NIR fluorescent Pd complexes (700–1000 nm) with quantum yields up to 14%. To understand the origin of NIR fluorescence, detailed analyses by density functional theory/time-dependent density functional theory (DFT/TDDFT) calculations together with femtosecond and nanosecond transient absorption spectroscopies suggest that M–C bond formation indeed leads to destabilization of the d–d excited state and less effective quenching of emission; and importantly, small spin–orbital coupling (SOC) and the large singlet-triplet energy gap are the primary causes of the non-population of triplet states. Comparison of PdII and PtII analogues shows that the non-radiative channel of the out-plane vibration of the tripyrrin plane effectively quenches the fluorescence of the PtII complex but not the PdII congener. We also demonstrate the proof-of-concept applications of PdII complexes (Pd-1 and Pd-3) encapsulated in silica nanoparticles, in both in vitro and in vivo bioimaging experiments without oxygen interference. Moreover, pH-induced reversible switching of NIR fluorescence was achieved even intracellularly using the Pd complex (Pd-2), which shows the potential to further develop perspective stimuli-responsive NIR materials.

Published
2019

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