19.01.2018 | Raffaella Demichelis; Natalya A. Garcia; Paolo Raiteri; Riccardo Innocenti Malini; Colin L. Freeman; John H. Harding ..., Journal of Physical Chemistry B, 2018

A new force field has been derived for the aqueous calcium phosphate system that aims to reproduce the key thermodynamic properties of the system, including free energies of hydration of the ions and the solubility of the solid mineral phases. Interactions of three phosphate anions (PO43–, ...

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18.01.2018 | Alexander Esser; Harald Forbert; Federico Sebastiani; Gerhard Schwaab; Martina Havenith; Dominik Marx, Journal of Physical Chemistry B, 2018

Spectroscopy in the terahertz frequency regime is a sensitive tool to probe solvation-induced effects in aqueous solutions. Yet, a systematic understanding of spectral lineshapes as a result of distinct solvation contributions remains terra incognita. We demonstrate that modularization of amino ...

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18.01.2018 | Pallavi Banerjee; Sudip Roy; Nitish Nair, Journal of Physical Chemistry B, 2018

We present a mesoscale model of aqueous polyacrylamide in the infinitely dilute concentration regime, by combining an extant coarse-grained (CG) force-field, MARTINI, and the Iterative Boltzmann Inversion protocol (IBI). MARTINI force-field was used to retain the thermodynamics of solvation of ...

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18.01.2018 | Junju Mu; Ryuhei Motokawa; Kazuhiro Akutsu; Shotaro Nishitsuji; Andrew J. Masters, Journal of Physical Chemistry B, 2018

We present evidence that the transition between organic and third phases, which can be observed in the plutonium uranium reduction extraction (PUREX) process at high metal loading, is an unusual transition between two isotropic bicontinuous microemulsion phases. As this system contains so many ...

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17.01.2018 | Olga Rancova; Ryszard Jankowiak; Darius Abramavicius, Journal of Physical Chemistry B, 2018

Spectroscopically relevant properties in photosynthetic reaction centers change during charge separation. In this paper, we focus on incorporation of the complete set of environmental fluctuations in the modeling of the nonlinear spectra of molecular aggregates. The model is applied in ...

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16.01.2018 | David Sustr; Antonín Hlaváček; Claus Duschl; Dmitry Volodkin, Journal of Physical Chemistry B, 2018

Comprehensive analysis of the multifractional molecular diffusion provides a deeper understanding of the diffusion phenomenon in the fields of material science, molecular and cell biology, advanced biomaterials, etc. Fluorescence recovery after photobleaching (FRAP) is commonly employed to probe ...

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16.01.2018 | Keiichiro Shiraga; Yuichi Ogawa; Koichiro Tanaka; Takashi Arikawa; Naotaka Yoshikawa; Masahito Nakamura; Katsuhiro A ..., Journal of Physical Chemistry B, 2018

Whether urea can serve as a kosmotrope or chaotrope has long been a topic of debate. In this study, broad-band THz spectroscopy (0.2–12 THz) of aqueous solutions of urea was used to characterize the hydration state and the hydrogen bond structure of water around urea. Three low-frequency ...

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16.01.2018 | Panisak Boonamnaj; Pornthep Sompornpisut, Journal of Physical Chemistry B, 2018

The voltage-gated proton-selective channel (Hv1) conducts protons in response to changes in membrane potential. The Hv1 protein forms dimers in the membrane. Crystal structures of Hv1 channels have revealed that the primary contacts between the two monomers are in the C-terminal domain (CTD), ...

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16.01.2018 | Nilangshu Mandal; Ayan Datta, Journal of Physical Chemistry B, 2018

Post-transition-state dynamics during the deazetization of 3 resulting in two degenerate semibullvalenes (4 and 5) have been investigated with density functional theory (DFT) and quasi-classical trajectory (QCT) calculations. Removal of N2 from 3 occurs through a synchronous and concerted pathway ...

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16.01.2018 | Praveenkumar Sappidi; Sadanandam Namsani; Sk. Musharaf Ali; Jayant Kumar Singh, Journal of Physical Chemistry B, 2018

Atomistic molecular dynamics (MD) simulations are performed in order to derive thermodynamic properties important to understand the extraction of gadolinium (Gd3+) and uranium dioxide (UO2) with dibenzo crown ether (DBCE) in nitrobenzene (NB) and octanol (OCT) solvents. The effect of polystyrene ...

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