Zhang, Hejian Conformationally Flexible Bis(9-fluorenylidene)porphyrin Diradicaloids. [electronic resource] - Angewandte Chemie (International ed. in English) 10 2017 - 13484-13488 p. digital Publication Type: Journal Article; Research Support, Non-U.S. Gov't ISSN: 1521-3773 Standard No.: 10.1002/anie.201707480 doi