1747-94-0Relevant academic research and scientific papers
Self-assembled boronic ester cavitand capsule as a photosensitizer and a guard nanocontainer against photochemical reactions of 2,6-diacetoxyanthracene
Nishimura, Naoki,Kobayashi, Kenji
experimental part, p. 6079 - 6085 (2010/11/04)
Figure presented. The optical properties of 2,6-diacetoxyanthracene 4 encapsulated in the self-assembled boronic ester cavitand capsule 3 in C 6H6 are described. Upon excitation at 285 nm, the encapsulated 4 showed strong fluorescence emission as a result of the energy transfer from the excited 3 to the encapsulated 4, while 4 alone in C 6H6 exhibited very weak emission. Upon photoirradiation at 365 nm, the encapsulated 4 also showed strong fluorescence emission and remained almost intact, whereas 4 alone in C6H6 gradually underwent photodimerization and photooxygenation to afford photodimers 5 and 5′ and 9,10-anthraquinone 6 via 9,10-endoperoxide 7, respectively. Thus, the capsule 3 serves as a photosensitizer for the encapsulated 4 as well as a guard nanocontainer to protect against the photochemical reactions of 4.
Guest-encapsulation properties of a self-assembled capsule by dynamic boronic ester bonds
Nishimura, Naoki,Yoza, Kenji,Kobayashi, Kenji
supporting information; experimental part, p. 777 - 790 (2010/04/01)
Two molecules of tetrakis(dihydroxyboryl)-cavitand 1a as an aromatic cavity and four molecules of 1,2-bis(3,4-dihydroxyphenyl)ethane 2 as an equatorial linker self-assemble into capsule 3a via the formation of eight dynamic boronic ester bonds in CDClsub
