Supramolecular Polymer of Near-Infrared Luminescent
Porphyrin Glass
Mitsuhiko Morisue
Yuki Hoshino
Masaki Shimizu
Takayuki Nakanishi
Yasuchika Hasegawa
Md. Amran Hossain
Shinichi Sakurai
Sono Sasaki
Shinobu Uemura
Jun Matsui
10.1021/acs.macromol.7b00316.s001
https://acs.figshare.com/articles/journal_contribution/Supramolecular_Polymer_of_Near-Infrared_Luminescent_Porphyrin_Glass/4818493
A comprehensive
study of supramolecular polymerization of ditopic
zinc (2-pyridylethynyl)porphyrin dimer <b>1</b> in
toluene and thin films was performed. A glass-forming porphyrin bearing
3,4,5-tri((<i>S</i>)-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 <b>1</b> in toluene solution. In spin-cast film, on the other hand, <b>1</b> 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.
2017-04-05 13:54:40
solution
Near-Infrared Luminescent Porphyrin Glass
film
ditopic
2- pyridylethynyl group
supramolecular polymer
supramolecular polymerization
toluene
self-complementary pyridyl-to-zinc coordination bonds
supramolecularly polymerized porphyrin glass
NIR