Studies of Hydrogen‐Bonded Systems. I. The Electronic Structure and the Double Well Potential of the N–H···N Hydrogen Bond of the Guanine—Cytosine Base Pair

1964 ◽  
Vol 41 (11) ◽  
pp. 3393-3401 ◽  
Author(s):  
Robert Rein ◽  
Frank E. Harris
Keyword(s):  
Hydrogen Bond ◽  
Electronic Structure ◽  
Base Pair ◽  
Hydrogen Bonded Systems ◽  
Double Well Potential ◽  
Hydrogen Bonded

Hydrogen bond effect on the photophysical properties of 2-ureido-4[1H]-pyrimidinone quadruple hydrogen bonded systems

RSC Advances ◽  
2015 ◽  
Vol 5 (46) ◽  
pp. 36279-36287 ◽  
Author(s):  
Jun-Sheng Chen ◽  
Feng-Jiao Zhao ◽  
Yang Yang ◽  
Tian-Shu Chu
Keyword(s):  
Hydrogen Bond ◽  
Photophysical Properties ◽  
Hydrogen Bonded Systems ◽  
Bond Effect ◽  
Hydrogen Bonded

Two different hydrogen bond effects on the photophysical properties of UPy systems in different solutions have been studied.

Proton transfer in hydrogen bonded systems

1960 ◽  
Vol 257 (1288) ◽  
pp. 98-108 ◽  
Keyword(s):  
Hydrogen Bond ◽  
Absorption Band ◽  
Hydrogen Bonds ◽  
Proton Transfer ◽  
Direct Result ◽  
Isotopic Substitution ◽  
Association Energy ◽  
Hydrogen Bonded Systems ◽  
Hydrogen Bonded

Evidence is presented that proton transfer occurs in certain special types of hydrogen bond and that as a direct result the association energy is increased. It is probable that this effect is also responsible for a t least a part of the broadening of the v XH absorption band. In support of this, a number of com pounds are described in which the hydrogen bonds are weakened by isotopic substitution. The implications of these findings are discussed.

Pressure Dependence of the Proton Transfer Equilibrium in Hydrogen Bonded Complexes

1986 ◽  
Vol 41 (1-2) ◽  
pp. 225-229 ◽  
Author(s):  
Mariusz Maćkowiak ◽  
Piotr Kozioł ◽  
Jan Stankowski
Keyword(s):  
Hydrogen Bond ◽  
Proton Transfer ◽  
Pressure Dependence ◽  
Pressure Coefficient ◽  
Nitrogen Bases ◽  
Single Well ◽  
Double Well Potential ◽  
Bonded Complexes ◽  
Hydrogen Bonded

35Cl NQR measurements were carried out on complexes of pentachlorophenol with nitrogen bases as a function of pressure (up to 300 MPa) and of temperature. It is shown that the sign and magnitude of the pressure coefficient of the 35Cl NQR frequency is related to the degree of proton transfer. An anomaly in the pressure coefficient of ν (35Cl) has been observed near 50% of the proton transfer in the hydrogen bond. This anomaly is discussed assuming that the proton transfer equilibrium is pressure dependent. The fact that the transition from the double-well potential of the hydrogen bond to the single-well potential occurs in the critical manner is also taken into account.

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