Synthesis and enhanced electron transfer of supramolecular nano-composite containing dendritic dye and surface-modified ZnO nano-rods. (October 2018)

• Record Type: Journal Article
• Authors: Lin, Chien-Min; Li, Ming-Shiou; Dwivedi, Atul Kumar; Lin, Hong-Cheu
• Is Part Of: Dyes and pigments. Volume 157(2018)
• Page Start: 179
• Page End: 189
• Publication Date: 2018-10
• Subjects: Supramolecular nano-composite -- Dendritic dye -- Surface-modified nano-rod -- Zinc oxide (ZnO) -- Photo-induced charge separation -- Electron transfer; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2018.04.052
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: Supramolecular nano-composites15T5N/ZnOx-PNH containing enhanced compatibilities of dendritic dye15T5N and surface-modified nano-rodZnOx-PNH were developed in this study. The physical properties of supramolecular nano-composites have been well investigated by theoretical calculation and various measurements, including UV–visible, PL, TEM, TCSPC, FT-IR, and CV. H-bonded nano-composite15T5N/ZnO 30 -PNH possessed the saturated quenched fluorscence as dendritic dye15T5N complexed with surface-modified nano-rodZnO 30 -PNH . In contrast to nano-rod mixture15T5N/ZnO (without surface-modification), more widened visible absorption band to promote more efficient photo-induced charge separation phenomenon was observed in supramolecular nano-composite15T5N/ZnO 30 -PNH . Compared with surfactantT-PNH, less efficient electron transfer of surfactantT-PC6 was observed in TCSPC and PL measurements because of the steric hindrance of long alkyl chains (-C6 H13 ) attached to surfactantT-PC6 . Therefore, the triple H-bonds between dendritic dye15T5N and surface-modified nano-rodZnO 30 -PNH are verified to result in the desirable effective electron transfer in supramolecular nano-composite15T5N/ZnO 30 -PNH . Graphical abstract: Highlights: Enhanced compatibilities of dendritic dye and surface-modified ZnO nano-rod were developed in H-bonded ZnO nano-composites. Wider visible absorptions to promote photo-induced charge separations were observed in supramolecular ZnO nano-composites. A lower electron transfer was observed in PL results due to the steric hindrance of the surfactant with a longer alkyl chain. Effective electron transfer between dendritic dye and surface-modified ZnO nano-rod was proven in H-bonded nano-composites.