Au nanorods modulated NIR fluorescence and singlet oxygen generation of water soluble dendritic zinc phthalocyanine

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• 作者：Xuefei Zhou ; Xiaohong He ; Shiliang Wei ; Kun Jia ; ^{jiakun@uestc.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Xiaobo Liu ; ^{liuxb@uestc.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Zinc phthalocyanine ; Gold nanorods ; Self-assembling ; Plasmonics ; NIR fluorophores
• 刊名：Journal of Colloid and Interface Science
• 出版年：2016
• 出版时间：15 November 2016
• 年：2016
• 卷：482
• 期：Complete
• 页码：252-259
• 全文大小：2122 K

文摘

A novel cyano-terminated zinc phthalocyanine (ZnPc-CN) exhibiting visible near infrared (vis-NIR) emitting around 690 nm in N,N-dimethylformamide (DMF) solvent has been synthesized. Furthermore, the peripheral cyano groups of newly synthesized zinc phthalocyanine were hydrolyzed in strong basic solution, leading to water soluble carboxylated zinc phthalocyanine (ZnPc-COOH) with completely quenched fluorescence in aqueous solution. Interestingly, we found that the NIR fluorescence of aqueous ZnPc-COOH was dramatically recovered in the presence of gold nanorods (Au NR), which was due to the alternation of ZnPc-COOH molecules self-assembling via electrostatic interaction between cetyltrimethylammonium bromide (CTAB) on the surface of Au NR and peripheral carboxyl of ZnPc-COOH. In addition, ZnPc-COOH/Au NR conjugates demonstrated an improved singlet oxygen generation, which could be served as potential bioimaging probe and photosensitizer for photodynamic therapy.