Permeability and Dynamics of a Monolayer are Mediated by ITO Support Surface-Modification.

Indium tin oxide (ITO) has been extensively used as a transparent conductor. The surface chemistry of ITO is amenable to reactions similar to those used to modify silica, but a long-standing issue has been understanding the density and robustness of the ITO surface-modification. We report on the formation of chemically bound Cd-complexed octadecylphosphonic acid (ODPA) monolayer formed on a Langmuir trough and deposited using Langmuir-Blodgett (LB) methodology onto an ITO surface, either in its native form or functionalized with phosphonate (RPO).

Quantitating the Binding Energy of Metal Ions to Langmuir-Blodgett Monolayers: The Copper(II)-Octadecylphosphonic Acid System.

We report on the formation and organization of a Cu-complexed octadecylphosphonic acid (ODPA) monolayer formed by Langmuir-Blodgett deposition. The formation of the Cu-complexed monolayer is seen to depend sensitively on the subphase pH and Cu concentration, and it is possible to form a monolayer containing the regions of complexed and free ODPA. From the pressure-area isotherm data for these monolayers, we determine the equilibrium constant and free energy of formation for the Cu-ODPA complex, Δ = -22.

Sonochemical synthesis and characterization of nano-belt lead(II) coordination polymer: new precursor to produce pure phase nano-sized lead(II) oxide.

Nanobelts of new a lead(II) coordination polymer, [Pb(3-pyc)(2)](n) (1), 3-Hpyc=3-pyridinecarboxilic acid were synthesized by a sonochemical method. The new nano-structure was characterized by scanning electron microscopy, X-ray powder diffraction, elemental analyses and IR spectroscopy. The thermal stability of compound was studied by thermal gravimetric and differential thermal analyses.

Sonochemical synthesis of nano-scale mixed-ligands lead(II) coordination polymers as precursors for preparation of PbO and PbBr(OH) nano-structures; thermal, structural and X-ray powder diffraction studies.

Nano-structures of two new lead(II) two-dimensional coordination polymers, [Pb(2)(2-pyc)(2)(I)(2)](n) (1) and [Pb(2)(2-pyc)(2)(Br)(2)](n) (2), {2-Hpyc=2-pyridinecarboxilic acid } were synthesized by a sonochemical method that produce the coordination polymers at nano-size. The new nano-structures were characterized by scanning electron microscopy, X-ray powder diffraction, IR spectroscopy and elemental analyses. Compounds 1 and 2 were structurally characterized by single crystal X-ray diffraction and consist of two-dimensional polymeric units.

New reversible crystal-to-crystal conversion of a mixed-ligand lead(II) coordination polymer by de- and rehydration.

A reversible crystal-to-crystal transformation of a new 2D lead(II) coordination polymer with the ligand 4-pyridinecarboxylic acid (4-Hpyc), [Pb(4-pyc)(Br)(H(2)O)](n) (1) to [Pb(4-pyc)(Br)](n) (2) by de- and rehydration, has been observed, and the structures of 1 and 2 have been determined by single-crystal X-ray diffraction. The thermal stabilities of compounds 1 and 2 were studied by thermal gravimetric and differential thermal analyses. Powder X-ray diffraction experiments showed that the structural transformation occurs in the batch powder samples and leads to monophasic products.