%0 Journal Article
%A Morisue, Mitsuhiko
%A Hoshino, Yuki
%A Shimizu, Masaki
%A Nakanishi, Takayuki
%A Hasegawa, Yasuchika
%A Hossain, Md. Amran
%A Sakurai, Shinichi
%A Sasaki, Sono
%A Uemura, Shinobu
%A Matsui, Jun
%D 2017
%T Supramolecular Polymer of Near-Infrared Luminescent
Porphyrin Glass
%U https://acs.figshare.com/articles/journal_contribution/Supramolecular_Polymer_of_Near-Infrared_Luminescent_Porphyrin_Glass/4818493
%R 10.1021/acs.macromol.7b00316.s001
%2 https://acs.figshare.com/ndownloader/files/7990033
%K solution
%K Near-Infrared Luminescent Porphyrin Glass
%K film
%K ditopic
%K 2- pyridylethynyl group
%K supramolecular polymer
%K supramolecular polymerization
%K toluene
%K self-complementary pyridyl-to-zinc coordination bonds
%K supramolecularly polymerized porphyrin glass
%K NIR
%X A comprehensive
study of supramolecular polymerization of ditopic
zinc (2-pyridylethynyl)porphyrin dimer 1 in
toluene and thin films was performed. A glass-forming porphyrin bearing
3,4,5-tri((S)-3,7-dimethyloctyloxy)phenyl
groups, named “porphyrin glass”, was introduced with
the 2-pyridylethynyl group as a supramolecular organizing unit; two
zinc (2-pyridylethynyl)porphyrins were held together by self-complementary
pyridyl-to-zinc coordination bonds to form a slipped-cofacial stack.
Then, ditopic zinc (2-pyridylethynyl)porphyrin could be
extended to a linear supramolecular polymer. The small binding constant
limited the degree of supramolecular polymerization of 1 in toluene solution. In spin-cast film, on the other hand, 1 adopted a form of supramolecular polymer of porphyrin glass,
which was effective enough to display a large bathochromic shift of
the absorption bands exceeding the narrowest limit of the optical
band gap extrapolated from the electronic structures in solution.
The supramolecularly polymerized porphyrin glass formed excimer, which
exhibited solid-state near-infrared (NIR) luminescence at approximately
1025 nm.
%I ACS Publications