@article{oai:iwate-u.repo.nii.ac.jp:00015501,
 author = {XUE, Songlin and KUZUHARA, Daiki and ARATANI, Naoki and YAMADA, Hiroko},
 issue = {21},
 journal = {International Journal of Molecular Sciences},
 month = {Oct},
 note = {Vinylene-bridged cyclic boron–difluoride complex of dipyrrin (BODIPY) trimers were successfully prepared from expanded dimethyl-vinylene bridged hexaphyrin(2.1.2.1.2.1) Me-Hex that has the structure of alternate dipyrrins and vinylene bridges. The hexaphyrin(2.1.2.1.2.1) Me-Hex can coordinate with boron ions to a_ord five kinds of cyclic BODIPYs given by step-by-step boron complexations. Crystal structures of all cyclic BODIPYs except for 3BF2-Me-Hex(b) formed non-planar structures. The theoretical calculation predicted that mono-/bis-boron cyclic BODIPYs show the intramolecular charge transfer (ICT) characteristics, whereas tri-boron cyclic BODIPYs have no ICT characteristics. Reflecting these electronic properties, tri-boron cyclic BODIPYs exhibit weak fluorescence in the red region, but mono-/bis-boron cyclic BODIPYs exhibit no emission. Vinylene bridged cyclic dipyrrin trimer Me-Hex is the novel porphyrinoid ligand allowed to control the boron coordination under di_erent reaction conditions to form various boron complexes.},
 title = {Vinylene-Bridged CyclicDipyrrin and BODIPY Trimers},
 volume = {21},
 year = {2020}
}