Fabrication of Large Single Crystals for Platinum‐Based Linear Polymers with Controlled‐Release and Photoactuator Performance. (4th November 2019)

• Record Type: Journal Article
• Authors: Yu, Qi; Li, Mingmin; Gao, Jia; Xu, Peixin; Chen, Qizhe; Xing, Dong; Yan, Jie; Zaworotko, Michael J.; Xu, Jun; Chen, Yao; Cheng, Peng; Zhang, Zhenjie
• Is Part Of: Angewandte Chemie. Volume 131:Number 51(2019)
• Page Start: 18807
• Page End: 18813
• Publication Date: 2019-11-04
• Subjects: Aktuatoren -- Lineare Polymere -- Nachhaltige Freisetzung -- Platin -- Topochemische Polymerisation; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201910749
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: Preparation of large single crystals of linear polymers for X‐ray analysis is very challenging. Herein, we employ a coordination‐driven self‐assembly strategy to secure the appropriate head‐to‐tail alignment of anthracene moieties, and for the first time obtained large‐sized Pt‐based linear polymer crystals through a [4+4] cycloaddition of anthracene in a single‐crystal to single‐crystal fashion. Using X‐ray diffraction to determine the polymer crystal structure, we found that both the polymerisation and depolymerisation steps proceed via a stable intermediate. Taking advantage of the temperature‐dependent slow depolymerization, the Pt‐based linear polymer showed potential as a sustained release anticancer drug platform. Utilizing the reversible contraction effect of unit‐cell volume upon irradiation or heating, the stimuli‐responsive crystals were hybridized with polyvinylidene fluoride to obtain a "smart material" with outstanding photoactuator performance. Abstract : Eine koordinationsgetriebene Selbstorganisationsstrategie gewährleistet die gewünschte Kopf‐Schwanz‐Ausrichtung von Anthraceneinheiten. So wurden große Kristalle Pt‐basierter, linearer Polymere durch eine [4+4]‐Cycloaddition von Anthracen auf Einkristall‐zu‐Einkristall‐Weise erhalten. Die reversible Kontraktion des Elementarzellvolumens bei Bestrahlung oder Erhitzen ergab einen Photoaktuator.