Hydrogen Bonded Arrays: The Power of Multiple Hydrogen Bonds

Abstract

Hydrogen bond interactions in small covalent model compounds (i.e., deprotonated polyhydroxy alcohols) were measured by negative ion photoelectron spectroscopy. The experimentally determined vertical and adiabatic electron detachment energies for (HOCH(2)CH(2))(2)CHO(-)(2a), (HOCH(2)CH(2))(3)CO(-) (3a), and (HOCH(2)CH(2)CH(OH)CH(2))(3)CO(-) (4a)reveal that hydrogen-bonded networks can provide enormous stabilizations and that a single charge center not only can be stabilized by up to three hydrogen bonds but also can increase the interaction energy between noncharged OH groups by 5.8 kcal mol(-1) or more per hydrogen bond. This can lead to pK(a) values that are very different from those in water and can provide some of the impetus for catalytic processes.

Perspective: Electrospray photoelectron spectroscopy: From multiply-charged anions to ultracold anions

“…52 The second-generation ESI-PES apparatus staying at Pacific Northwest National Laboratory continues to yield interesting results. [53][54][55] …”

“…[41][42][43][44][45][46][47][48][49][50][51][52][53][54][55] Issendorff and coworkers have also coupled a cryogenic 12-pole linear ion trap with a magnetic-bottle PES analyzer for the study of atomic clusters. 114 The moderate resolution of the magneticbottle analyzer is sufficient for MCAs, for which no slow electrons are possible due to the RCB.…”

A multi-agent quantum Monte Carlo model for charge transport: Application to organic field-effect transistors

“…[41][42][43][44][45][46][47][48][49][50][51][52][53][54][55] Issendorff and coworkers have also coupled a cryogenic 12-pole linear ion trap with a magnetic-bottle PES analyzer for the study of atomic clusters. 114 The moderate resolution of the magneticbottle analyzer is sufficient for MCAs, for which no slow electrons are possible due to the RCB.…”

Superacidity of P(OH)3 and SO(OH)2 derivatives of cyclopentadiene and vinylcyclopentadiene in the gas phase: A computational DFT analysis

“…The promotion of the aromaticity of the conjugate base after deprotonation and introduction of electron withdrawing groups (EWG) are common strategies used in the design of potent Brønsted organic acids. In addition, a deprotonated anion can be further stabilized by a network of hydrogen bonding interactions, which become stronger on deprotonation . The single‐centered hydrogen‐bond enhanced acidity (SHEA) acid are a class of strong acids whose conjugate bases benefit from the hydrogen bonding network .…”