Photochemical photon upconverters with ionic liquids

被引：41

作者：

Murakami, Yoichi ^{[1
]}

机构：

[1] Tokyo Inst Technol, Global Edge Inst, Meguro Ku, Tokyo 1528550, Japan

来源：

CHEMICAL PHYSICS LETTERS | 2011年 / 516卷 / 1-3期

关键词：

POWER UP-CONVERSION; AB-INITIO CALCULATIONS; CONFORMATIONAL ISOMERISM; NAYF4; NANOCRYSTALS; TEMPERATURE; CATION; FLUORESCENCE; PHASE; 1-BUTYL-3-METHYLIMIDAZOLIUM; DIFFUSION;

D O I：

10.1016/j.cplett.2011.09.065

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Photochemical photon upconverters based on triplet-triplet annihilation (TTA) between excited molecules have been developed using ionic liquids (ILs) for the first time. The employed aromatic molecules are found to be stable in the polar environment of ILs, contrary to expectation. The mechanism of the stable solvation is proposed. The upconversion quantum yields (UC-QYs) for different ILs are measured and it is found that the UC-QYs rapidly saturate as the excitation light power increases. An analytical model was developed and compared with the experimental data. It is shown that ILs are not viscous media for the purpose of TTA-based upconversion. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：56 / 61

页数：6

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