29636-94-0Relevant articles and documents
Application of stimuli-responsive FRET behavior toward cyanide detection in a photo-switchable [2]pseudorotaxane polymer containing the BODIPY donor and the merocyanine acceptor
Gouda, Chinmayananda,Barik, Debashis,Maitra, Chandrima,Liang, Kai-Chieh,Ho, Feng-Cheng,Srinivasadesikan, Venkatesan,Chandran, Sarala,Wu, Shu-Pao,Lin, Ming-Chang,Lin, Hong-Cheu
supporting information, p. 2321 - 2333 (2021/03/06)
We have developed a supramolecular (close form) [2]pseudorotaxane polymer containing the green-emissive (λem= 523 nm) BODIPY-based pillar[5]arene host and the non-emissive spiropyran (SP)-based cyano guest (close form), which can be converted t
Unlocking Chemically Encrypted Information Using Three Types of External Stimuli
Zhang, Hanwei,Li, Qingyun,Yang, Yabi,Ji, Xiaofan,Sessler, Jonathan L.
supporting information, p. 18635 - 18642 (2021/11/16)
Encryption is critical to information security; however, existing chemical-based information encryption strategies are still in their infancy. We report here a new approach to chemical encryption involving a supramolecular gel QR (quick response) code wit
Light-Driven Expansion of Spiropyran Hydrogels
Li, Chuang,Iscen, Aysenur,Palmer, Liam C.,Schatz, George C.,Stupp, Samuel I.
supporting information, p. 8447 - 8453 (2020/05/22)
The incorporation of molecular switches in organic structures is of great interest in the chemical design of stimuli-responsive materials that mimic the complex functions of living systems. Merocyanine dyes that convert to spiropyran moieties upon exposure to visible light have been extensively studied as they can be incorporated in hydrated covalent networks that will expel water when this conversion occurs and induce a volumetric shrinkage. We report here on a sulfonate-based water-soluble photoswitch that, in contrast to the well-known systems, triggers a volumetric expansion in hydrogels upon exposure to photons. Contraction is in turn observed under dark conditions in a highly reversible manner. The novel behavior of the photoswitch incorporated in the covalent network was predicted by coarse-grained simulations of the system's chemical structure. Using pH control and polymeric structures that differ in lower critical solution temperature, we were able to develop hydrogels with highly tunable volumetric expansion. The novel molecular function of the systems developed here led to materials with the negative phototaxis observed in plants and could expand the potential use of hydrogels as sensors, soft robots, and actuators.