Tracking the light-induced isomerization processes and the photostability of spiropyrans embedded in the pores of crystalline nanoporous MOFs via IR spectroscopy | Zendy

Heidi A. Schwartz | Zendy; Dominik Schaniel | Zendy; Uwe Ruschewitz | Zendy

Open Access

Tracking the light-induced isomerization processes and the photostability of spiropyrans embedded in the pores of crystalline nanoporous MOFs via IR spectroscopy

Author(s) -

Heidi A. Schwartz,

Dominik Schaniel,

Uwe Ruschewitz

Publication year - 2020

Publication title -

photochemical and photobiological sciences

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.699

H-Index - 101

eISSN - 1474-9092

pISSN - 1474-905X

DOI - 10.1039/d0pp00267d

Subject(s) - photochromism , spiropyran , nanoporous , photochemistry , isomerization , materials science , solvatochromism , chemistry , nanotechnology , organic chemistry , solvent , catalysis

The embedment of photochromic dyes into porous host matrices has attracted increasing interest in recent years. Especially the class of spiropyrans has been considered because of its outstanding photochromic and solvatochromic response. We herein present a comprehensive infrared spectroscopic characterization of the photoresponse and photostability of a nitro-substituted spiropyran "SP-Nitro" (namely 1,3,3-trimethylindolino-6'-nitrobenzopyrylospiran) non-covalently attached to different crystalline nanoporous MOF (metal-organic framework) host lattices. The TTC mesomeric form of SP-Nitro has been found to be preferably generated upon UV light exposure inside the different MOF hosts. Additionally, the excited isomer was found to be stable for prolonged irradiation times of 1-1.5 h.

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