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Solvatochromic and Photochromic Behavior of Spiropyran‐cored PAMAM Dendron and Cu 2+ ‐Selective Sensing
Author(s) -
Hur Dae Young,
Shin Eun Ju
Publication year - 2015
Publication title -
bulletin of the korean chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.237
H-Index - 59
ISSN - 1229-5949
DOI - 10.1002/bkcs.10027
Subject(s) - spiropyran , solvatochromism , photochromism , merocyanine , photochemistry , acetonitrile , chemistry , dendrimer , solvent , absorption (acoustics) , materials science , polymer chemistry , organic chemistry , composite material
Spiropyran‐cored polyamidoamine ( PAMAM) dendrons ( SP‐PAMAMs ) were prepared and their solvatochromic and photochromic properties investigated. As with simple merocyanine ( MC ), MC‐PAMAM shows negative solvatochromism. On UV irradiation, colorless SP‐PAMAM transforms into colored MC‐PAMAM and the reaction occurs a little faster in a more polar solvent. In the dark, MC‐PAMAM returns to SP‐PAMAM much more slowly in a more polar solvent. On addition of Cu 2+ , the color of SP‐PAMAM solution in acetonitrile changes from colorless to orange, whereas neither color change nor absorption spectral changes are observed with the addition of other metal cations.