Synthesis and characterization of chiral aza-macrocycles and study of their enantiomer recognition ability for organo-phosphoric acid and phosphonic acid derivatives by 31P NMR and fluorescence spectroscopy

2016 ◽  
Vol 14 (9) ◽  
pp. 2742-2748 ◽  
Author(s):  
Aditya N. Khanvilkar ◽  
Ashutosh V. Bedekar
Keyword(s):  
Fluorescence Spectroscopy ◽  
Phosphoric Acid ◽  
Phosphonic Acid ◽  
31P Nmr ◽  
Optically Active ◽  
Chiral Discrimination ◽  
Synthesis And Characterization ◽  
Phosphonic Acids ◽  
Recognition Ability

Two diastereomers of optically active N,O-containing new macrocycles with dual chirality were synthesized and evaluated for chiral discrimination of organo phosphoric and phosphonic acids by 31P NMR and fluorescence spectroscopy.

Synthesis and characterization of 5-(4-carboxyphenylspermine)-10,15,20-triphenylporphyrin

2020 ◽  
Vol 24 (05n07) ◽  
pp. 802-808
Author(s):  
Chiara M.A. Gangemi ◽  
Rosalba Randazzo ◽  
Massimiliano Gaeta ◽  
Cosimo G. Fortuna ◽  
Maria E. Fragalà ◽  
...  
Keyword(s):  
Fluorescence Spectroscopy ◽  
Photophysical Properties ◽  
Soret Band ◽  
Fluorescence Band ◽  
Synthesis And Characterization ◽  
Acidic Solutions ◽  
Protonation Equilibria ◽  
The Core ◽  
Aggregation Processes

We synthetized and characterized a mono spermine porphyrin derivative by NMR, UV-vis and fluorescence spectroscopy. The photophysical properties and the protonation equilibria of 5-(4-carboxyphenylspermine)-10,15,20-triphenylporphyrin have been investigated, showing that porphyrin does not aggregate in acidic solutions, differently from what occurs as soon as the core of the porphyrin is deprotonated. These aggregation processes have been detected by the rising of new fluorescence band and a significant splitting of the Soret band.

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