Structural–Spectrochemical Correlations of Variable Dimensionality Crystalline Metal–Organic Framework Materials in Hydrothermal Reactivity Patterns of Binary–Ternary Systems of Pb(II) with (a)Cyclic (Poly)carboxylate and Aromatic Chelator Ligands

Efforts
to comprehend the structural–spectrochemical correlations of
crystalline metal–organic framework materials of Pb­(II) with
(a)­cyclic and aromatic chelators linked to photoluminescent applications
led to the hydrothermal pH-specific synthesis of crystalline materials
[Pb­{H2BTC}­(phen)­(H2O)]n·2nH2O­(1), [Pb2{CBTC}]n(2), [Pb4(phen)8{CBTC}2(H2O)4]3·70.3H2O­(3), and [Pb­{HCTA}­(H2O)2]n·nH2O­(4). X-ray studies showed that 1–4 exhibit unique architectures linked
to 2D–3D coordination polymers formulated by Z-type units composed
of Pb2O2 cores, unusually high number of lattice–water
molecules, and π–π and H-bond interactions. The
contribution of the nature–structure properties of the aliphatic-(a)­cyclic
organic (poly)­carboxylic/aromatic chelators-ligands to binary-ternary
Pb­(II) reactivity weaves into the assembly of supramolecular networks,
thereby providing clear structural–spectroscopic inter-relationships
exemplifying the observed photoluminescent activity in a distinct
MOF-linked fashion.