Carbazole-Based Organogel as a Scaffold To Construct Energy Transfer Arrays with Controllable Fluorescence Emission

• Published in: Langmuir 2008-12, Vol.24 (23), p.13730-13735
• Main Authors: Yang, Xinchun, Lu, Ran, Xue, Pengchong, Li, Bin, Xu, Defang, Xu, Tinghua, Zhao, Yingying
• Format: Article
• Language: English
• Subjects: Benzamides - chemistry; Carbazoles - chemistry; Chemistry; Colloidal state and disperse state; Energy Transfer; Exact sciences and technology; Fluorescence; Gels - chemistry; General and physical chemistry; Materials: Nano-and Mesostructured Materials, Polymers, Gels, Liquid Crystals, Composites; Molecular Structure; Particle Size; Pyrroles - chemical synthesis; Pyrroles - chemistry; Surface physical chemistry; Surface Properties; Time Factors; X-Ray Diffraction
• ISSN: 0743-7463; 1520-5827
• DOI: 10.1021/la8027226

A diaryldiketopyrrolopyrrole derivative functionalized with phenothiazine moieties (DPPP) was synthesized and introduced into the ordered 4-(3,6-di-tert-butyl-9H-carbazol-9-yl)benzamide (TBCB) organogel system. It was found that TBCB-based gel became a scaffold to make DPPP molecules line up along the gel fibers, resulting in new self-assembled arrays, whose XRD patterns were quite different from those of the neat TBCB gel and DPPP crystal. In the composite gel, the occurrence of a partial energy transfer from the excited light-harvesting antenna of TBCB to the DPPP acceptor was confirmed on the basis of time-dependent and time-resolved fluorescence investigations. Remarkably, the composite gel could emit intense red light or purplish white light by tuning the excitation wavelength. Such ordered soft materials with color-tunable emission may possess potential applications in sensor and photonic devices.