caa a22 4500 465807917 CHVBK 20180323112108.0 cr unu---uuuuu 170327e19900101xx s 000 0 eng 10.1007/BF00943891 doi (NATIONALLICENCE)springer-10.1007/BF00943891 Frozen-liquid PMR spectra and interactions of water with spherical carbon adsorbents [Elektronische Daten] [V. Turov, V. Kolychev, É. Bakai, T. Burushkina, A. Chuiko] The PMR spectrum from a spherical carbon adsorbent shows separate signals from the water in the pores (δ 2-0 ppm) and outside the granules (δ 5 ppm) at temperatures above 273 K because of the short spin relaxation times in the presence of numerous paramagnetic centers. Below 273 K, the water bound to the carbon after heat treatment above 1273 K may be in two states: A (δ A 2-0 ppm) and B (δ B −12 to −13 ppm). The enthalpy of (H2O) A ⇄(H2O) B is −50 kJ/mole. State B is associated with the graphitization occurring above 1273 K. It is suggested that the anomalous chemical shifts in states A and B are due to axial coordination in relation to the condensed benzene ring systems at the negatively charged surfaces. Plenum Publishing Corporation, 1990 Turov V. Surface Chemistry Institute, Ukrainian Academy of Sciences, Kiev aut Kolychev V. Surface Chemistry Institute, Ukrainian Academy of Sciences, Kiev aut Bakai É. Surface Chemistry Institute, Ukrainian Academy of Sciences, Kiev aut Burushkina T. Surface Chemistry Institute, Ukrainian Academy of Sciences, Kiev aut Chuiko A. Surface Chemistry Institute, Ukrainian Academy of Sciences, Kiev aut Theoretical and Experimental Chemistry Kluwer Academic Publishers-Plenum Publishers 26/1(1990-01-01), 102-105 0040-5760 26:1<102 1990 26 11237 https://doi.org/10.1007/BF00943891 text/html Onlinezugriff via DOI 1 brief-communication jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00943891 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Turov V. Surface Chemistry Institute, Ukrainian Academy of Sciences, Kiev aut NATIONALLICENCE 700 1- Kolychev V. Surface Chemistry Institute, Ukrainian Academy of Sciences, Kiev aut NATIONALLICENCE 700 1- Bakai É. Surface Chemistry Institute, Ukrainian Academy of Sciences, Kiev aut NATIONALLICENCE 700 1- Burushkina T. Surface Chemistry Institute, Ukrainian Academy of Sciences, Kiev aut NATIONALLICENCE 700 1- Chuiko A. Surface Chemistry Institute, Ukrainian Academy of Sciences, Kiev aut NATIONALLICENCE 773 0- Theoretical and Experimental Chemistry Kluwer Academic Publishers-Plenum Publishers 26/1(1990-01-01), 102-105 0040-5760 26:1<102 1990 26 11237 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer