Efficient optical limiting of polypyrrole ternary nanohybrids co-functionalized with peripherally substituted porphyrins and axially coordinated metal-porphyrins

• Published in: Dalton transactions : an international journal of inorganic chemistry Vol. 48; no. 38; pp. 14467 - 14477
• Main Authors: Wang, Aijian, Cheng, Laixiang, Chen, Xiaodong, Li, Cheng, Zhang, Jing, Zhu, Weihua
• Format: Journal Article
• Language: English
• Published: Cambridge Royal Society of Chemistry 01.10.2019
• Subjects: Absorption; Charge transfer; Constraining; Electrochemical impedance spectroscopy; Fluorescence; Nonlinear optics; Optoelectronic devices; Polypyrroles; Porphyrins; Substitution reactions
• ISSN: 1477-9226; 1477-9234
• DOI: 10.1039/c9dt02716e

Herein, three polypyrrole-based nanohybrids were designed and prepared via a nucleophilic substitution reaction, i.e. , peripherally substituted porphyrin-functionalized PPy (TPP-PPy), axially coordinated metal-porphyrin-functionalized PPy (SnTPP-PPy), and polypyrrole ternary nanohybrids co-functionalized with peripherally substituted porphyrins and axially coordinated metal-porphyrins (TPP-PPy-SnTPP). The TPP-PPy, SnTPP-PPy and TPP-PPy-SnTPP nanohybrids exhibited improved nonlinear optical and optical limiting performances when compared to the individual PPy and porphyrins under 4 ns, 532 nm laser pulses. Their improved optical nonlinearities were ascribed to a combination of mechanisms and efficient charge transfer effect between the porphyrins and PPy. The charge transfer effect between the porphyrins and PPy was confirmed by UV-vis absorption, fluorescence and electrochemical impedance spectroscopy. The TPP-PPy-SnTPP ternary nanohybrid exhibited the best nonlinear absorption, nonlinear refraction and optical limiting performances because of more effective charge transfer effect, which provides a new avenue for the development of polypyrrole-porphyrin systems in the fields of nonlinear optics and optoelectronic devices. The TPP-PPy-SnTPP ternary nanohybrid exhibits efficient nonlinear optical performances due to its greater effective charge transfer effect, which provides a new avenue for the development of novel optoelectronic devices.