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Shape‐Memory Platinum(II) Complexes: Intelligent Vapor‐History Sensor with ON–OFF Switching Function
Author(s) -
Shigeta Yasuhiro,
Kobayashi Atsushi,
Ohba Tadashi,
Yoshida Masaki,
Matsumoto Takeshi,
Chang HoChol,
Kato Masako
Publication year - 2016
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201503247
Subject(s) - amorphous solid , diimine , water vapor , materials science , platinum , adsorption , porosity , chemical engineering , chemistry , crystallography , organic chemistry , composite material , catalysis , engineering
A novel platinum(II)–diimine complex, [Pt(CN) 2 (H 2 dcphen)] ( 1 ; H 2 dcphen=4,7‐dicarboxy‐1,10‐ phenanthroline), was synthesized and its vapochromic shape‐memory behavior was evaluated. The as‐synthesized amorphous purple solid, [Pt(CN) 2 (H 2 dcphen)]⋅2 H 2 O ( 1 P ), exhibited vapochromic behavior in the presence of alcoholic vapors through transformation to a red, crystalline, porous, vapor‐adsorbed form, 1 R⊃vapor . The obtained 1 R⊃vapor complex released the adsorbed vapors upon heating without collapse of the porous structure. The vaporfree, porous 1 R⊃open could detect water or n ‐hexane vapor, although these vapors could not induce 1 P ‐to‐ 1 R⊃vapor transformation, and 1 R⊃open could easily be converted to the initial 1 P by manual grinding. These results indicate that 1 is a new shape‐memory material that functions through formation and collapse of the porous framework with an emission change upon vapor‐adsorption and grinding; this enables it to exhibit vapor history and ON–OFF switching sensing functions.