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Tailored Band Gaps in Sulfur‐ and Nitrogen‐Containing Porous Donor–Acceptor Polymers
Author(s) -
Schwarz Dana,
Kochergin Yaroslav S.,
Acharjya Amitava,
Ichangi Arun,
Opanasenko Maksym V.,
Čejka Jiří,
Lappan Uwe,
Arki Pal,
He Junjie,
Schmidt Johannes,
Nachtigall Petr,
Thomas Arne,
Tarábek Ján,
Bojdys Michael J.
Publication year - 2017
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.201703332
Subject(s) - sulfur , nitrogen , polymer , acceptor , porosity , materials science , porous medium , band gap , chemical engineering , chemistry , organic chemistry , optoelectronics , composite material , physics , engineering , condensed matter physics , metallurgy
Donor–acceptor dyads hold the key to tuning of electrochemical properties and enhanced mobility of charge carriers, yet their incorporation into a heterogeneous polymer network proves difficulty owing to the fundamentally different chemistry of the donor and acceptor subunits. A family of sulfur‐ and nitrogen‐containing porous polymers (SNPs) are obtained via Sonogashira–Hagihara cross‐coupling and combine electron‐withdrawing triazine (C 3 N 3 ) and electron‐donating, sulfur‐containing linkers. Choice of building blocks and synthetic conditions determines the optical band gap (from 1.67 to 2.58 eV) and nanoscale ordering of these microporous materials with BET surface areas of up to 545 m 2 g −1 and CO 2 capacities up to 1.56 mmol g −1 . Our results highlight the advantages of the modular design of SNPs, and one of the highest photocatalytic hydrogen evolution rates for a cross‐linked polymer without Pt co‐catalyst is attained (194 μmol h −1 g −1 ).