Modulating the Self-Assembly of Calix[4]azacrowns to Design Materials with Improved Emission and Stimuli-Responsive Behavior

被引：13

作者：

Oueslati, Issam ^{[1
]}

Paixao, Jose A. ^{[1
]}

Rodrigues, Vitor H. ^{[1
]}

Shkurenko, Aleksander ^{[2
]}

Lesniewska, Barbara ^{[2
]}

Suwinska, Kinga ^{[2
]}

Eusebio, M. Ermelinda S. ^{[3
]}

Maria, Teresa M. R. ^{[3
]}

Sergio Seixas de Melo, J. ^{[3
]}

机构：

[1] Univ Coimbra, CEMDRX, P-3004516 Coimbra, Portugal

[2] Polish Acad Sci, Inst Phys Chem, PL-01224 Warsaw, Poland

[3] Univ Coimbra, Dept Chem, P-3004535 Coimbra, Portugal

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2014年 / 118卷 / 24期

关键词：

AGGREGATION-INDUCED EMISSION; SOLID-STATE; FLUORESCENT; COORDINATION; POLYMORPHISM; EMITTERS; BONDS; CHAIN;

D O I：

10.1021/jp5039392

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：

1,3-[Ethylene-bis(aminocarbonylmethyl)]-p-tert-butylcalix[4]arene is analyzed and its optical properties are investigated, showing luminescence upon aggregation at low temperature or in the solid state described as aggregation-induced blue emission. The shift of the self-assembly from nanoporous to helical framework in the crystal is associated with a remarkable blue-shift and 33-fold increase in the fluorescence intensity. The purple-blue light emission is highly efficient (Phi(F) similar to 60%) and is switched to thermally activated yellow emission as a stimuli-responsive behavior of the helical assembly. The emitting material has been characterized by single crystal and powder X-ray diffraction, ATR-FTIR spectroscopy, and DSC and PLTM analysis, and its optical properties are investigated.

引用

页码：13118 / 13125

页数：8

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