Photochemistry of aromatic compounds. Part 1.—Acid-base properties of singlet and triplet excited states of pyrene derivatives and aza-aromatic compounds

1969 ◽  
Vol 65 (0) ◽  
pp. 3258-3262 ◽  
Author(s):  
E. Vander Donckt ◽  
R. Dramaix ◽  
J. Nasielski ◽  
C. Vogels
Keyword(s):  
Excited States ◽  
Aromatic Compounds ◽  
Acid Base ◽  
Pyrene Derivatives ◽  
Triplet Excited States ◽  
Base Properties

Ground and excited states acid-base properties of acridine-1,8-dione dyes

1997 ◽  
Vol 111 (1-3) ◽  
pp. 163-169 ◽  
Author(s):  
B. Venkatachalapathy ◽  
P. Ramamurthy ◽  
V.T. Ramakrishnan
Keyword(s):  
Excited States ◽  
Acid Base ◽  
Base Properties

Synthesis and properties of water-soluble porphyrins bearing multidentate ligands

2004 ◽  
Vol 08 (08) ◽  
pp. 1047-1054 ◽  
Author(s):  
Yoshio Uemori ◽  
Masato Sakurai ◽  
Atsuko Osada ◽  
Hiroki Munakata ◽  
Hiroyasu Imai ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Aromatic Compounds ◽  
Covalent Binding ◽  
Nitrilotriacetic Acid ◽  
Association Constants ◽  
Water Soluble ◽  
Para Position ◽  
Multidentate Ligands ◽  
Acid Base ◽  
Base Properties

Water-soluble porphyrins bearing multidentate ligands were prepared by covalent binding of nitrilotriacetic acid to 5,10,15,20-tetrakis(4-aminophenyl)porphyrin or three atropisomers of 5,10,15,20-tetrakis(2-aminophenyl)porphyrin. The acid-base properties and monomer-dimer behavior of the porphyrins were affected by the positions of the multidentate ligands with respect to the porphyrin plane. Among the porphyrins, the porphyrin bearing multidentate ligands at the para position of the phenyl groups dimerized in an aqueous solution. The association constants of the porphyrins with various aromatic compounds were studied in water at pH 7.4 containing 10 mM HEPES at 25°C. These values varied with the structure and charges of both the porphyrins and the aromatic compounds. The association constants of the porphyrin bearing multidentate ligands at the 2-position of the phenyl groups were small compared to those of the porphyrin bearing multidentate ligands at the 4-position.

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