Stimuli-Responsive Circularly Polarized Luminescence of Gold Clusters Based on Hydrogen-Bond Driven Intercluster Coupling.

 0 Người đánh giá. Xếp hạng trung bình 0

Tác giả: Zhen Han, Wen-Yang Jiao, Hai-Yang Li, Yubing Si, Yan Wang, Shuang-Quan Zang, Si-Meng Zhai, Han Zhang, Li-Xin Zhang, Ya-Qing Zhang

Ngôn ngữ: eng

Ký hiệu phân loại: 171.8 Systems based on altruism

Thông tin xuất bản: Germany : Angewandte Chemie (International ed. in English) , 2025

Mô tả vật lý:

Bộ sưu tập: NCBI

ID: 694009

Stimuli-responsive circularly polarized luminescence (CPL) metal clusters hold significant potential in high-security encryption and sensing applications, yet the exploration of hydrogen-bond-driven CPL-active metal clusters remains limited. Here, we report the synthesis of an enantiomeric pair of rhomboid Au4 clusters utilizing chiral R/S-4-hydroxymethyl-5-methyloxazole-2-thione (R/S-HMMT) ligands. Two enantiomeric pairs of self-assembled metal clusters R/S-Au4(HMMT)4-blue and R/S-Au4(HMMT)4-red were obtained, by constructing distinct intercluster hydrogen bonds through the use of different crystalline solvents. In R/S-Au4(HMMT)4-blue, 1,4-dioxane guest molecules were observed to form a hydrogen-bond network with the hydroxyl groups of the cluster surface ligands. In contrast, a different hydrogen-bond network involving the hydroxyl groups of the surface ligands was identified in R/S-Au4(HMMT)4-red, resulting in a distinct stacking pattern. The unique intercluster couplings mediated by hydrogen bonds result in R/S-Au4(HMMT)4-blue exhibiting a blue CPL emission at 466 nm, while R/S-Au4(HMMT)4-red shows a dual CPL emission at 446 and 727 nm. Theoretical calculations reveal that hydrogen-bond driven intercluster couplings in R-Au4(HMMT)4-red are significantly stronger than in R-Au4(HMMT)4-blue. Additionally, both solid R/S-Au4(HMMT)4-blue and R/S-Au4(HMMT)4-red undergo reversible CPL transformations in response to organic vapors, temperature, or mechanical stimuli, due to the destruction and reconstruction of hydrogen-bond networks. These characteristics make them promising materials for information encryption applications.
Tạo bộ sưu tập với mã QR

THƯ VIỆN - TRƯỜNG ĐẠI HỌC CÔNG NGHỆ TP.HCM

ĐT: (028) 36225755 | Email: tt.thuvien@hutech.edu.vn

Copyright @2024 THƯ VIỆN HUTECH