Effect of Hydrogen Bonding on the Near Ultraviolet Absorption of Naphthol

1957 ◽  
Vol 26 (4) ◽  
pp. 881-886 ◽  
Author(s):  
S. Nagakura ◽  
M. Gouterman
Keyword(s):  
Hydrogen Bonding ◽  
Ultraviolet Absorption ◽  
Near Ultraviolet

Steric Effects on the Near-Ultraviolet Absorption (Soret Band) of Porphyrins

1963 ◽  
Vol 85 (22) ◽  
pp. 3621-3624 ◽  
Author(s):  
Alsoph H. Corwin ◽  
David G. Whitten ◽  
Earl W. Baker ◽  
George G. Kleinspehn
Keyword(s):  
Soret Band ◽  
Ultraviolet Absorption ◽  
Steric Effects ◽  
Near Ultraviolet

Near Ultraviolet Absorption of Pyridine Vapor

1946 ◽  
Vol 14 (2) ◽  
pp. 101-112 ◽  
Author(s):  
H. Sponer ◽  
Hildegard Stücklen
Keyword(s):  
Ultraviolet Absorption ◽  
Near Ultraviolet

The Near-ultraviolet Absorption Spectrum of Diimide in Liquid Ammonia and its Decomposition between −65 and −38 °C

1974 ◽  
Vol 52 (13) ◽  
pp. 2513-2515 ◽  
Author(s):  
R. A. Back ◽  
C. Willis
Keyword(s):  
Absorption Spectrum ◽  
Gas Phase ◽  
Room Temperature ◽  
Liquid Ammonia ◽  
Vibrational Structure ◽  
Ultraviolet Absorption ◽  
Ultraviolet Absorption Spectrum ◽  
First Order ◽  
Rapid Decomposition ◽  
Near Ultraviolet

The near-ultraviolet absorption spectrum of diimide in liquid ammonia at −50 °C is shifted about 500 Å to the red compared with the gas-phase spectrum, with λmax = 4000 Å. The spectrum is also broadened and the vibrational structure largely obscured. It is suggested that hydrogen bonding is responsible for these changes.Diimide is much more stable in liquid ammonia between −65 and −38 °C than in the gas phase at room temperature. A first-order decay is observed with Arrhenius parameters of A = 1.9 × 103 s−1 and E = 6.6 kcal/mol; this is always preceded by a more rapid, higher-order initial decay which may be related to the rapid decomposition observed during vaporization.

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