@article{oai:nagoya.repo.nii.ac.jp:02003770, author = {Takiguchi, Asahi and Inai, Naoto and Kang, Seongsoo and Hagai, Masaya and Lee, Seokwon and Yanai, Takeshi and Kim, Dongho and Shinokubo, Hiroshi}, issue = {40}, journal = {Chemical Communications}, month = {May}, note = {We synthesised thionium-ion embedded aromatic porphyrinoids: a free-base 5-thiaporphyrinium cation and its zinc complex. The sulphur atom effectively participates in the macrocyclic π-conjugation. Fluorescence quantum yields of thiaporphyrinium cations were lower than 1% unlike oxaporphyrinium cations. Detailed photophysical analysis and DFT calculations clarified the vibrational mode regarding the out-of-plane motion of the sulphur atom induced ultrafast quenching of the excited state in comparison to the corresponding oxaporphyrinium cations.}, pages = {5956--5959}, title = {5-Thiaporphyrinium cation: effect of sulphur incorporation on excited state dynamics}, volume = {58}, year = {2022} }