1613337-29-3Relevant academic research and scientific papers
Synthesis of a doubly SO2-fused phlorin: Tuning the structure and properties by the SO2 groups
Li, Chengjie,Liu, Xiujun,Shao, Jiewei,Su, Guangxian,Xie, Yongshu
, p. 799 - 806 (2018/05/25)
A doubly SO2-fused phlorin 4 has been synthesized by the [2 + 2] condensation of dipyrromethanecarbinol 2 and SO2-fused dipyrromenthane 3 in the presence of TFA, followed by DDQ oxidation. The SO2-fused phlorin 4 has been characterized by absorption, fluorescence, mass and NMR spectra, as well as X-ray analysis. Compared to the β-unsubstituted phlorin 5, the SO2-fused phlorin 4 exhibits a red-shifted absorption spectrum (around 12 nm), a more distorted molecular conformation, as well as nice photostability even with an electron-donating meso-3,5-di-tert-butylphenyl group. The titration of 4 and 5 with TBAF has been monitored by absorption spectroscopy. The deprotonated phlorin 4 shows a peak at 870 nm which is red shifted by 26 nm compared to that of deprotonated 5.
Phlorins bearing different substituents at the sp3-hybridized meso-position
Bruce, Alexandra M.,Weyburne, Emily S.,Engle, James T.,Ziegler, Christopher J.,Geier III, G. Richard
, p. 5664 - 5672 (2014/07/08)
Phlorins bearing different substituents at the sp3-hybridized meso-position were investigated. The extent to which different substituents at this unique position can influence phlorin spectroscopic properties, structure, and stability is of int
