Exploration of Energy Modulations in Novel RhB-TPE-Based Bichromophoric Materials via Interactions of Cu2+ Ion under Various Semiaqueous and Micellar Conditions

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• 作者：Ravinder Singh ; Atul Kumar Dwivedi ; Ashutosh Singh ; Chien-Min Lin ; Reguram Arumugaperumal ; Kung-Hwa Wei ; Hong-Cheu Lin
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：March 16, 2016
• 年：2016
• 卷：8
• 期：10
• 页码：6751-6762
• 全文大小：779K
• ISSN：1944-8252

文摘

Novel bichromophoric materials TR-A and TR-B consisting of an entirely new combination of TPE and RhB units were developed to explore the optimum conditions of energy modulations via pH variation and Cup>2+p> interaction at various water contents of CH₃CN. Interestingly, TR-A and TR-B, at 60 and 70% water contents, respectively, favored the optimum Cup>2+p>-mediated energy modulations from TPE to RhB and thus achieve the brightest orange emissions of free RhB with complete disappearance of aggregation-induced emission (AIE) from TPE. Furthermore, various micellar conditions of triton-X-100, SDS, and CTAB were employed to adjust energy modulations of TR-A and TR-B at high water contents (at 80 and 90%, respectively). The incorporation of RhB into triton-X-100 micellar cavities disrupted AIE from TPE; thus, none of the energy modulations from TPE to RhB occurred even in the presence of Cup>2+p> ion. Interestingly, the micellar conditions of anionic surfactant (SDS) favored the increased local concentration of Cup>2+p> ions in the vicinity of scavangable RhB and facilitated the generation of noncyclic free RhB in situ via bright-orange emissions.