A twofold interpenetrating three-dimensional heterometallic metal-organic framework with pcu topology based on 2-methylbiphenyl-4,4'-dicarboxylic acid.

The 2-methylbiphenyl-4,4'-dicarboxylate (mbpdc) ligand has versatile coordination modes and can be used to construct multinuclear structures. Despite this, reports of the synthesis of coordination complexes involving this ligand are scarce. The title compound, poly[[triaquadi-μ-hydroxido-hexakis(μ-2-methylbiphenyl-4,4'-dicarboxylato)calcium(II)hexazinc(II)] monohydrate], {[CaZn(CHO)(OH)(HO)]·HO}, has been prepared by the hydrothermal assembly of Zn(NO)·6HO, CaCl and 2-methylbiphenyl-4,4'-dicarboxylic acid.

Nonsequential double ionization of Mg from a doubly excited complex driven by circularly polarized laser field.

With the classical ensemble method, the correlated-electron dynamics of Mg atom from a doubly excited, transition Coulomb complex in few-cycle circularly polarized (CP) laser field at low laser intensity is theoretically investigated. The low energy transfer during the recollision process indicates that the two electrons cannot release directly, but it can pass through a doubly excited state, and then escape with the ionization time difference. The numerical results show that the feature of the sequential double ionization (SDI) can be observed in the nonsequential double ionization (NSDI) process.