%0 Journal Article %1 Shen_2021 %A Shen, Chia-An %A Stolte, Matthias %A Kim, Jin Hong %A Rausch, Anja %A Würthner, Frank %D 2021 %I American Chemical Society (ACS) %J J. Am. Chem. Soc. %K myown %N 31 %P 11946--11950 %R 10.1021/jacs.1c05934 %T Double J-Coupling Strategy for Near Infrared Emitters %U https://doi.org/10.1021%2Fjacs.1c05934 %V 143 %X Fluorophores emitting in the near-infrared (NIR) are highly desired for various applications, but increasing nonradiative rates cause severe fluorescence quenching for wavelengths beyond 800 nm. Here, a bis(squaraine) dye is reported that bears two NIR dyes in a head-to-tail chromophore arrangement. This arrangement leads to intramolecular J-type exciton coupling, resulting in an absorption maximum at 961 nm and a fluorescence peak at 971 nm with a quantum yield of 0.33% in chloroform. In less polar toluene, the bis(squaraine) self-assembles into nanofibers, affording another bathochromic shift with an absorption maximum at 1095 nm and a fluorescence peak at 1116 nm originating from intermolecular J-type coupling.

@article{Shen_2021, abstract = {Fluorophores emitting in the near-infrared (NIR) are highly desired for various applications, but increasing nonradiative rates cause severe fluorescence quenching for wavelengths beyond 800 nm. Here, a bis(squaraine) dye is reported that bears two NIR dyes in a head-to-tail chromophore arrangement. This arrangement leads to intramolecular J-type exciton coupling, resulting in an absorption maximum at 961 nm and a fluorescence peak at 971 nm with a quantum yield of 0.33% in chloroform. In less polar toluene, the bis(squaraine) self-assembles into nanofibers, affording another bathochromic shift with an absorption maximum at 1095 nm and a fluorescence peak at 1116 nm originating from intermolecular J-type coupling.}, added-at = {2021-09-01T09:41:04.000+0200}, author = {Shen, Chia-An and Stolte, Matthias and Kim, Jin Hong and Rausch, Anja and Würthner, Frank}, biburl = {https://www.bibsonomy.org/bibtex/27949a76ef40d5d1df1e0d77e713cd4ad/wuerthner_group}, doi = {10.1021/jacs.1c05934}, interhash = {0cd89ae78b768335ea500457ce753792}, intrahash = {7949a76ef40d5d1df1e0d77e713cd4ad}, journal = {J. Am. Chem. Soc.}, keywords = {myown}, month = jul, number = 31, pages = {11946--11950}, publisher = {American Chemical Society ({ACS})}, timestamp = {2021-10-18T11:07:25.000+0200}, title = {Double J-Coupling Strategy for Near Infrared Emitters}, url = {https://doi.org/10.1021%2Fjacs.1c05934}, volume = 143, year = 2021 }