TY  - JOUR
AU  - Li, Yin
AU  - Csók, Zsolt
AU  - Kollár, László
AU  - Koichi, Iwata
AU  - Szász, Erzsébet
AU  - Kunsági-Máté, Sándor
TI  - The role of the solvation shell decomposition of alkali metal ions in their selective complexation by resorcinarene and its cavitand
JF  - SUPRAMOLECULAR CHEMISTRY
J2  - SUPRAMOL CHEM
VL  - 24
PY  - 2012
IS  - 6
SP  - 374
EP  - 378
PG  - 5
SN  - 1061-0278
DO  - 10.1080/10610278.2012.678358
UR  - https://m2.mtmt.hu/api/publication/2010539
ID  - 2010539
AB  - 2-Methylresorcinarene and its methylene-bridged cavitand derivative as host compounds were investigated in selective
complexation of alkali metal ions as guests in methanol media by photoluminescence measurements. These host molecules
possess either flexible (2-methylresorcinarene) or rigid (cavitand) molecular skeleton. The Benesi–Hildebrand method and
the van’t Hoff theory have been applied to determine the stability constants and the thermodynamic parameters,
respectively. Considerable interactions between 2-methylresorcinarene and Liþ or Naþ ions have been observed while the
rigid cavitand derivative can interact only with Kþ or Csþ ions. Neither the complexes of 2-methylresorcinarene with Kþ or
Csþ nor those of the cavitand derivative with Liþ or Naþ ions are stable at room temperature in methanol media. Quantumchemical
investigations justified that only solvated Liþ and Naþ ions can form stable complexes with 2-methylresorcinarene
while unsolvated Kþ and Csþ ions form stable complexes with the methylene-bridged cavitand. These results highlight that
the stability of the guest solvation shell and its size could play a key role in the selectivity behaviour of host molecules.
LA  - English
DB  - MTMT
ER  - 

TY  - JOUR
AU  - Kunsági-Máté, Sándor
AU  - Csók, Zsolt
AU  - Iwata, K
AU  - Szász, Erzsébet
AU  - Kollár, László
TI  - Role of the Conformational Freedom of the Skeleton in the Complex Formation Ability of Resorcinarene Derivatives toward a Neutral Phenol Guest
JF  - JOURNAL OF PHYSICAL CHEMISTRY B
J2  - J PHYS CHEM B
VL  - 115
PY  - 2011
IS  - 13
SP  - 3339
EP  - 3343
PG  - 5
SN  - 1520-6106
DO  - 10.1021/jp111145d
UR  - https://m2.mtmt.hu/api/publication/1530402
ID  - 1530402
AB  - The interaction of phenol guest molecules with 2-methylresorcinarene and its methylene-bridged cavitand derivative has been investigated in methanol. The host molecules were selected according to the flexibility of their cavities by varying the conformational freedom of the molecular skeleton prior to molecular association. The results show stronger host-phenol interactions when the host molecule possesses a rigid molecular skeleton (i.e., cavitand) compared to that of the flexible resorcinarene with phenol. Although the enthalpy change associated with the molecular interactions was found to be the same in both cases, higher negative entropy change was obtained when the resorcinarene interacted with the phenol molecules at room temperature. As a result, stronger host-guest complexes are formed at room temperature when the host molecules, possessing a rigid molecular skeleton, participated in the complex formation. Furthermore, since the higher entropy change results in higher temperature-dependence of the interactions, the stability of the complexes formed with the flexible resorcinarene is smaller at higher temperature. These results highlight that the decreasing flexibility of the host molecular skeleton itself can determine the entropy change during the complexation process; therefore, the temperature dependence of the complex stabilities highly depends on the flexibility of the host's molecular skeleton. This information might contribute to the development of selective and sensitive sensor molecules toward phenol derivatives.
LA  - English
DB  - MTMT
ER  - 

TY  - GEN
AU  - Katalin, Kispál
AU  - Szász, Erzsébet
AU  - Sophie, Lecomte
AU  - Wilmar, van Grondelle
AU  - Céline, Valéry
AU  - Bernard, Desbat
AU  - Sándor, Kunsági-Máté
TI  - Concentration Dependent Kinetics of Self Association of Somatostatin Molecules - CECE 7th International Interdisciplinary Meeting on Bioanalysis, Pécs October 15-16, 2010
PY  - 2010
UR  - https://m2.mtmt.hu/api/publication/1750796
ID  - 1750796
LA  - English
DB  - MTMT
ER  - 

TY  - CONF
AU  - Szász, Erzsébet
AU  - Pettersson, Kurt
ED  - W D, Williams
TI  - Nitrogen upptake and fixation by phytoplankton in Lake Erken (Sweden) during summer. International Association of Theoretical and Applied Limnology 27, 4, 1995-1999
T2  - Proceedings (Verhandlungen) of the International Association of Theoretical and Applied Limnology
PB  - E. Schweizerbart´sche Verlagsbuchhandlung
C1  - Stuttgart
PY  - 2001
SP  - 1995
EP  - 1999
PG  - 5
UR  - https://m2.mtmt.hu/api/publication/1750794
ID  - 1750794
N1  - Folyóirat nem található: The Proceedings of the International 
Association of Theoretical and Applied Limnology
#Folyóirat nem található: International Association of 
Theoretical and Applied Limnology 
Füzet: 4
Kezdő oldal: 1995
Befejező oldal: 1999
Kötet: 27
LA  - English
DB  - MTMT
ER  - 

TY  - THES
AU  - Szász, Erzsébet
TI  - A fényviszonyok, a nitrogénfölvétel és az elsődleges termelés kölcsönhatásai a Balaton eltérő trofitású tájain
PY  - 1990
SP  - 120
UR  - https://m2.mtmt.hu/api/publication/1750789
ID  - 1750789
LA  - Hungarian
DB  - MTMT
ER  -