NANOTECHNOLOGY
·
2020
·Vol. 31
·期 13
·134004
·
IF 3.551
Xiaoyu Wang,Jinjin Guo,Qian Zhang,Shuxian Zhu,Lu Liu,Xiaofeng Jiang,Da-Hua Wei,Ru-Shi Liu,Lidong Li
Pathogenic bacterial infection, especially in the wound, may threaten human health. Developing new antibacterial materials for wound healing is still urgent. Metal nanoclusters have been explored as a novel antibacterial agent. Herein, biomolecule gelatin was chosen as a substrate and functionalized with gold/silver clusters for bacterial killing. Through a simple amidation reaction, gold/silver clusters were successfully conjugated in a gelatin substrate to obtain a Au/Ag@gelatin sponge. The presence of gold/silver clusters modified the porous structure of the gelatin. Thus, the water absorption and water retention of the Au/Ag@gelatin sponge were enhanced. More importantly, the gold/silver clusters show aggregation-enhanced emission and strong reactive oxygen generation, that endow the Au/Ag@gelatin sponge with a good antibacterial property. The good physical performance and favorable bactericidal activity of the Au/Ag@gelatin sponge suggest its potential for application as a wound dressing.
研究领域:
生物材料学
·
医学
·
纳米生物学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2020
·
IF 4.825
Kuan-Guan Liu,Xue-Wen Wei,Fahime Bigdeli,Xue-Mei Gao,Jing-Zhe Li,Xiao-Wei Yan,Mao-Lin Hu,Ali Morsali
Advancement of the synthesis and control of the self-assembly process of new high-nucleus silver clusters with desired structures is important for both the material sciences and the many applications. Herein, three new silver clusters, 20-, 22-, and 8-nucleus, based on alkynyl ligands were constructed and their structures were confirmed by single-crystal X-ray diffraction, powder X-ray diffraction, elemental analyses, and Fourier-transform infrared spectroscopy (FT-IR). For the first time, the trivalent tetrahedron anion of AsO43–, as a template, and the surface ligand of Ph2PO2H, with new coordination modes, were employed in preparation of the silver clusters. The role of surface ligands and template anions in the size and structure of the clusters was investigated. The presence of the template in the structure of the clusters led to the formation of the high-nucleus clusters. Also, in this report, it was shown that the participation of the template in the assembly of a cluster can be controlled by the surface ligands. UV–vis absorption and luminescent properties of the clusters and the thermal stability of the 8-nucleus cluster were also studied.
研究领域:
材料科学
·
化学合成
·
配位化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Omega
·
2022
·
IF 4.132
Qingxin Liu,Yinglan Wu,Min Feng,Wanmin Chen,Zhiping Zheng
Silver complexes with proteinogenic amino acid ligands are of interest for biomedical and antimicrobial applications. In this work, we obtained {[Ag7(l-his)4](NO3)3·3H2O}0.2{[Ag8(l-his)4(H2O)2](NO3)4·3H2O}0.8 (1) and {[Ag7(d-his)4](NO3)3·3H2O}0.2{[Ag8(d-his)4(H2O)2](NO3)4·3H2O}0.8 (2), which represent the first example of any Ag-exclusive complex featuring a cluster-type core motif and with only proteinogenic amino acid ligands. Upon immersion into acetonitrile, an interesting single-crystal-to-single-crystal transformation occurred to produce a new cluster complex of the formula [Ag8(l-his)4(NO3)(H2O)](NO3)3 (3). Using a racemic mixture of histidine, the reaction under otherwise identical conditions led to the production of the second example of a three-dimensional (3D) network structured Ag-exclusive complex with only a proteinogenic amino acid ligand. Compared with other Ag–histidine complexes in the literature, the significance of reaction conditions, particularly the Ag/histidine ratio and pH of the reaction mixture, is revealed. Temperature-dependent emission of 1 and 2 at 440 nm characteristic of silver–philophilic interactions was also observed.
研究领域:
无机化学
·
生物医学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF CLUSTER SCIENCE
·
2020
·Vol. 32
·期 2
·437-443
·
IF 1.731
Li Hong-Jing,Wei Xue-Wen,Liu Kuan-Guan,Yan Xiao-Wei
For investigating the template effects and the ligand roles in constructing structurally charming silver clusters, we isolated and analyzed a new cluster compound, namely, [(CO 3 ) 2 @Ag 25 (C≡C t Bu) 15 (CF 3 CO 2 ) 3 (Ph 2 PO 2 ) 2 I] , 1 . We report here the synthesis, crystal structure, characterization by various spectroscopic (IR, solid-state NMR, XPS) techniques and the luminescent property of this cluster. Its X-ray crystal structure reveals that the cluster is a 25-nuclearity silver cage with double CO 3 2− ions encapsulated in. Two diphenylphosphinates in new coordination mode (μ 2 :O 1 ,O 1 ) are co-protecting on the surface of cluster 1 . Also, the cluster emits orange-red light in the solid-state at 77 K.
研究领域:
无机化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）