박치영 (한국과학기술연구원)

한빛사논문

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한국과학기술연구원

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Angew. Chem.-Int. Edit., Volume 56, Issue 20, pages 5485-5489, May 8, 2017 | DOI: 10.1002/anie.201701152 Signal-Induced Release of Guests from a Photolatent Metal–Phenolic Supramolecular Cage and Its Hybrid Assemblies

Dr. Chiyoung Park^1,*, Dr. Beom Joo Yang¹, Ki Beom Jeong^1,2, Dr. Chae Bin Kim¹, Prof. Seunghyun Lee² and Dr. Bon-Cheol Ku¹¹Institute of Advanced Composite Materials, Korea Institute of Science and Technology, Jeonbuk, Korea
² Department of Advanced Materials Engineering, University of Suwon, Hwaseong-si, South Korea

^*Corresponding author

Abstract

The coordination chemistry of plant polyphenols and metal ions can be used for coating various substrates and for creating modular superstructures. We herein explored this chemistry for the controlled release of guests from mesoporous silica nanoparticles (MSNs). The selective adsorption of tannic acids (TAs) on MSN silica walls opens the MSN mesoporous channels without disturbing mass transport. The channel may be closed by the coordination of TA with CuII ions. Upon exposure to light, photolysis of Trojan horse guests (photoacid generators, PAGs) leads to acid generation, which enables the release of payloads by decomposing the outer coordination shell consisting of TA and CuII. We also fabricated a modular assembly of MSNs on glass substrates. The photoresponsive release characteristics of the resulting film are similar to those of the individual MSNs. This method is a fast and facile strategy for producing photoresponsive nanocontainers by non-covalent engineering of MSN surfaces that should be suitable for various applications in materials science.

Keywords: controlled release; hybrid assemblies; mesoporous silica nanoparticles; signaling cascades; tannic acid

논문정보

형식Research article
게재일2017년 05월 (BRIC 등록일 2017-05-22)
연구진국내 연구진
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