Premium
Antibacterial Narrow‐Band‐Gap Conjugated Oligoelectrolytes with High Photothermal Conversion Efficiency
Author(s) -
Wang Bing,
Feng Guangxue,
Seifrid Martin,
Wang Ming,
Liu Bin,
Bazan Guillermo C.
Publication year - 2017
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201709887
Subject(s) - conjugated system , photothermal therapy , materials science , fluorescence , absorption (acoustics) , energy conversion efficiency , optoelectronics , bacillus subtilis , photochemistry , chemistry , nanotechnology , bacteria , polymer , optics , physics , biology , composite material , genetics
Abstract Two conjugated oligoelectrolytes (COEs), WMG1 and WMG2, were designed with the goal of achieving near infrared absorption and high photothermal conversion efficiency. Specifically, electron‐rich thiophene and electron‐poor benzo[1,2‐c:4,5‐c′]bis[1,2,5]thiadiazole subunits were introduced into the conjugated core to modulate the optical gap and to reduce the fluorescence emission efficiency. WMG1 and WMG2 show absorption maxima at around 800 nm, which favors tissue penetration. Although relatively small in size, WMG1 and WMG2 exhibit photothermal conversion efficiencies of circa 60 % and 54 %, respectively. WMG1 shows dark toxicity to the Gram positive bacterium B. subtilis and good photothermal killing efficiency toward both B. subtilis and Gram negative E. coli , features that demonstrate the promising potential of the COE molecular design for photothermal applications.