680575-57-9Relevant articles and documents
Internally 1,4-phenylene-bridged meso aryl-substituted expanded porphyrins: The decaphyrin and octaphyrin cases
Anand, Venkataramanarao G.,Saito, Shohei,Shimizu, Soji,Osuka, Atsuhiro
, p. 7244 - 7248 (2005)
Current affairs: Incorporation of a 1,4-phenylene bridge into meso aryl-substituted decaphyrin and octaphyrin has a profound impact on the structural and electronic properties of the macrocycles. Bridged decaphyrin has two oxidation states, one of which s
Dipyrromethane + dipyrromethanedicarbinol routes to an electron deficient meso-substituted phlorin with enhanced stability
O'Brien, Anna Y.,McGann, John P.,Geier III, G. Richard
, p. 4084 - 4092 (2007)
(Chemical Equation Presented) Two dipyrromethane + dipyrromethanedicarbinol routes to a meso-substituted phlorin bearing electron-withdrawing pentafluorophenyl substituents (TpFPPhl) were investigated in an attempt to obtain a phlorin with enhanced stabil
Calix[5]phyrin for Fluoride Ion Sensing with Visible and Near Infrared Optical Responses
Higashino, Tomohiro,Kumagai, Atsushi,Imahori, Hiroshi
supporting information, p. 2019 - 2022 (2018/08/11)
Fluoride (F?) ion sensing is an important topic due to its roles in health, medical, and environmental sciences. In this regard, colorimetric sensors with a near infrared (NIR) optical response are useful in biological systems because they can avoid interference from endogenous chromophores. Although calix[n]phyrins are highly attractive as sensors with the NIR optical response, studies on calix[n]phyrins are still limited owing to their intrinsic instability against ambient light and air. In this study, we report the synthesis and characterization of a new calix[5]phyrin bearing one sp3-hybridized carbon atom as a π-expanded calix[n]phyrin. Upon addition of tetrabutylammonium fluoride, the calix[5]phyrin exhibited distinct NIR absorptions at 908 and 1064 nm as well as a visible color change. Importantly, it revealed an excellent selectivity for F? ion. These results demonstrate that calix[5]phyrins are promising colorimetric and NIR sensors of F? ion.
2,3,17,18-Tetrahalohexaphyrins and the first phlorin-type hexaphyrins
Higashino, Tomohiro,Osuka, Atsuhiro
, p. 1994 - 2002 (2013/09/23)
1-(Triisopropylsilyl)-3,4-dichloropyrrole and 1-(triisopropylsilyl)-3,4- difluoropyrrole were conveniently prepared from the corresponding 3,4-dibromopyrrole by lithiation followed by halogenation. 2,3,17,18- Tetrahalogeno [26]- and [28]hexaphyrins have b
