Unknown

Dataset Information

0

Ultrafast N-H vibrational dynamics of cyclic doubly hydrogen-bonded homo- and heterodimers.


ABSTRACT: Hydrogen-bonded interfaces are essential structural elements in biology. Furthermore, they can mediate electron transport by coupling the electron to proton transfer within the interface. The specific hydrogen-bonding configuration and strength have a large impact on the proton transfer, which exchanges the hydrogen-bonded donor and acceptor species (i.e., NH...O --> N...HO). Modulations of the hydrogen-bonding environment, such as the hydrogen-bond stretch and twist modes, affect the proton-transfer dynamics. Here, we present transient grating and echo peak shift measurements of the NH stretch vibrations of four doubly hydrogen-bonded cyclic dimers in their electronic ground state. The equilibrium vibrational dynamics exhibit strong coherent modulations that we attribute to coupling of the high-frequency NH vibration to the low-frequency interdimer stretch and twist modes and not to interference between multiple Fermi resonances that dominate the substructure of the linear spectra.

SUBMITTER: Petersen PB 

PROVIDER: S-EPMC4596713 | biostudies-literature | 2008 Oct

REPOSITORIES: biostudies-literature

altmetric image

Publications

Ultrafast N-H vibrational dynamics of cyclic doubly hydrogen-bonded homo- and heterodimers.

Petersen Poul B PB   Roberts Sean T ST   Ramasesha Krupa K   Nocera Daniel G DG   Tokmakoff Andrei A  

The journal of physical chemistry. B 20080927 42


Hydrogen-bonded interfaces are essential structural elements in biology. Furthermore, they can mediate electron transport by coupling the electron to proton transfer within the interface. The specific hydrogen-bonding configuration and strength have a large impact on the proton transfer, which exchanges the hydrogen-bonded donor and acceptor species (i.e., NH...O --> N...HO). Modulations of the hydrogen-bonding environment, such as the hydrogen-bond stretch and twist modes, affect the proton-tra  ...[more]

Similar Datasets

| S-EPMC5424700 | biostudies-literature
| S-EPMC6309517 | biostudies-literature
| S-EPMC3199452 | biostudies-literature
| S-EPMC3389584 | biostudies-literature
| S-EPMC5706742 | biostudies-literature
| S-EPMC6177455 | biostudies-literature
| S-EPMC8885862 | biostudies-literature
| S-EPMC7865749 | biostudies-literature
| S-EPMC6644661 | biostudies-literature
| S-EPMC3829914 | biostudies-other