This invention concerns a compound of any of the formulae V, VI or VII
wherein X in formula V is S or O and R8-R10 are each independently selected from the following:
HO(CH2)n―
HOOC(CH2)n―
(HO)2B(CH2)n―
(R11O)3Si(CH2)n―
wherein R11 is C1-10 alkyl and n = 1-10.
These compounds are suitable for use in electrochromic devices.
Stable electron acceptor compositions are composed of a plurality of pillared metal complexes disposed on a supporting substrate. At least one Group VIII metal at zero valence is entrapped within this matrix. The complexes comprise from one to about 100 units of the formula: --(Y.sup.1 O.sub.3 --Z--Y.sup.2 O.sub.3)Me.sup.1 -- Y.sup.1 and Y.sup.2 being phosphorus or arsenic; Z being a divalent group which reversibly forms a stable reduced form and contains two conjugated cationic centers having a negative E.degree..sub.red value; and Me.sup.1 being a trivalent or tetravalent metal of Group III, IVA, or IVB having an atomic number of at least 21 or a lanthanide. The units are bound to the substrate through a divalent linking group. Counter anions balance the charge of Z. The compositions can be used in the decomposition of water to yield hydrogen gas, the sensing of oxygen, and as catalysts.
A method for the production of hydrogen peroxide from a source of hydrogen and a source of oxygen in the presence of a catalyst comprising the formula: (Y.sup.1 O.sub.3 --Z--Y.sup.2 O.sub.3)(Y.sup.3 O.sub.3 R.sup.3)Me Y.sup.1, Y.sup.2 and Y.sup.3 being phosphorus or arsenic; Z being a divalent group containing two conjugated cationic centers; R.sup.3 being a capping group and Me being a trivalent or tetravalent metal.
Heterolamellar photoelectrochemical films and devices
申请人:The Trustees of Princeton University
公开号:US05695890A1
公开(公告)日:1997-12-09
Multi-layered compositions having a plurality of pillared metal complexes disposed on a supporting substrate, the pillars comprising divalent electron acceptor moieties with a phosphonate or arsenate at each end. Each layer of parallel pillars is separated by a layer of a group (IVA), (IVB), (IIIA) or (IIIB) metal or a lanthanide. The compositions can further comprise particles of at least one Group VIII metal at zero valence entrapped within each layer of the complex. The complexes can also incorporate "stalactites" and "stalagmites" of capped arsonato or phosphonato ligands interspersed with the pillars providing a series of interstices about each electron accepting group. The supporting substrate can be comprised of an organic polymer template. The complexes are useful for the conversion and storage of solar energy, for the production of photocurrents, and as catalysts for reduction reactions, for example, the production of hydrogen peroxide from oxygen and hydrogen gases, the production of H.sub.2 gas from water, and the reduction of ketones to form alcohols.
Charge generators in heterolamellar multilayer thin films
申请人:University of Southern California
公开号:US06107561A1
公开(公告)日:2000-08-22
Multi-layered compositions having a plurality of pillared metal complexes disposed on a supporting substrate, the pillars comprising divalent electron acceptor moieties with a phosphonate or arsenate at each end. The pillars can be electron donating, electron accepting or charge generating in nature. Each layer of parallel pillars is separated by a layer of a group (IVA), (IVB), (IIIA) or (IIIB) metal or a lanthanide. The compositions can further comprise particles of at least one Group VIII metal at zero valence entrapped within each layer of the complex. The complexes can also incorporate "stalactites" and "stalagmites" of capped arsonato or phosphonato ligands interspersed with the pillars providing a series of interstices about each electron accepting group. The supporting substrate can be comprised of an organic polymer template. The complexes are useful for the conversion and storage of solar energy, for the production of photocurrents, and as catalysts for reduction reactions, for example, the production of hydrogen peroxide from oxygen and hydrogen gases, the production of H.sub.2 gas from water, and the reduction of ketones to form alcohols.