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Tuning of Polyoxopalladate Macroanionic Hydration Shell via Countercation Interaction
Author(s) -
He Jiazhi,
Li Hui,
Yang Peng,
Haso Fadi,
Wu Jiayingzi,
Li Tao,
Kortz Ulrich,
Liu Tianbo
Publication year - 2018
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201705873
Subject(s) - divalent , chemistry , counterion , ion , attraction , solvent , inorganic chemistry , crystallography , solvation shell , solvation , organic chemistry , linguistics , philosophy
Three types of macroanion–countercation interactions in dilute solution, decided by the strength of electrostatic attraction and the change of hydration shells are reported: minor interaction between macroanions [MO 8 Pd 12 (SeO 3 ) 8 ] 6− (M=Zn 2+ or Ni 2+ ) and monovalent cations (Na + , K + , Rb + , Cs + ), leaving their hydration shells intact (solvent‐separated ion‐pairs); strong binding between macroanions and divalent cations (Sr 2+ , Ba 2+ ) to form solvent‐shared ion‐pairs with partial dehydration; very strong electrostatic attraction between macroanions and Y 3+ ion with contact ion‐pairs formation by severely breaking their original hydration shells and forming new ones. In addition, divalent cations can help the macroanions self‐assemble into hollow spherical blackberry structures through counterion‐mediated attraction, whereas macroanions with mono‐ or trivalent cations only stay as discrete ions due to either weak interaction or a small number of bound countercations.