ChemInform Abstract: Chemistry and Application of Organic Isocyanates. Part 10. Synthesis of Aliphatic Diisocyanates Containing Oxygen or Sulfur Bridge in Polymethylene Chain.

ChemInform ◽  
2010 ◽  
Vol 25 (20) ◽  
pp. no-no
Author(s):  
T. LESIAK ◽  
L. MACIEJEWSKI
Keyword(s):  
Polymethylene Chain

A refined treatment of normal vibrations of polymethylene chain

1963 ◽  
Vol 11 (1-6) ◽  
pp. 422-432 ◽  
Author(s):  
M Tasumi ◽  
T Shimanouchi ◽  
T Miyazawa
Keyword(s):  
Normal Vibrations ◽  
Polymethylene Chain

Coumarin–nucleotide base pairs. Ultraviolet absorption, fluorescence, and photochemical study

1984 ◽  
Vol 62 (10) ◽  
pp. 2006-2010 ◽  
Author(s):  
Grażyna Wenska ◽  
Stefan Paszyc
Keyword(s):  
Excitation Energy ◽  
Fluorescence Intensity ◽  
Ultraviolet Absorption ◽  
Base Pairs ◽  
Nucleotide Base ◽  
Polymethylene Chain ◽  
Hypochromic Effect

Bichromophoric compounds containing a nucleotide base and coumarin linked with a polymethylene chain have been synthesized. A hypochromic effect was observed for adenine–coumarin pairs in contrast to the thymine containing compound. The fluorescence intensity of coumarin when bound into these systems was found to be significantly reduced. It has also been demonstrated that excitation energy is transferred from adenine or thymine to the coumarin moiety. Intermolecular dimerization of coumarin residues was observed upon irradiation of an adenine–coumarin pair.

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