Structural Evolution of Ultrathin Films of Rhodamine 6G on Glass

被引：39

作者：

Chapman, Mingyu ^{[1
]}

Mullen, Matthew ^{[1
]}

Novoa-Ortega, Elsa ^{[1
]}

Alhasani, Mona ^{[1
]}

Elman, James F. ^{[2
]}

Euler, William B. ^{[1
]}

机构：

[1] Univ Rhode Isl, Dept Chem, Kingston, RI 02881 USA

[2] Filmetr Applicat Lab Rochester, Fairport, NY 14450 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2016年 / 120卷 / 15期

关键词：

THIN-FILMS; FLUORESCENCE SPECTROSCOPY; PYRENE MONOMER; XANTHENE DYES; AGGREGATION; EXCIMER; ABSORPTION; PHOTODEGRADATION; ADSORPTION; DYNAMICS;

D O I：

10.1021/acs.jpcc.6b01669

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：

Self-organized rhodamine 6G (Rh6G) thin films on a glass substrate were prepared by spin-coating, dip-coating, and drop-coating. The thickness of the Rh6G layer strongly influences both the absorption and emission spectra, which are accounted for by monomers, exciton and excimer formation, and molecular aggregation. Submonolayer films of Rh6G show one maximum and one apparent shoulder in the absorption spectrum, but three peaks are required for deconvolution of the spectrum. As the thin film becomes thicker, the observed maximum shifts to lower energy, and a fourth peak is required for deconvolution. The emission spectra show similar features. In addition, the relative intensity of the emission is strongly dependent on the film thickness with thinner films being substantially more emissive than thick films.

引用

页码：8289 / 8297

页数：9

共 41 条

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