In order to create polymer catalysts which can photodecompose aqueous alcohol solutions by visible light, proper polymerization conditions of alkyl titanates were investigated. As alkyl titanate, butyl titanate (monomer and tetramer), isobutyl titanate, and isopropy l titanate were used as the starting material for polymerization. They were dissolved in tetrahydrofuran, benzene, ethanol and other solvents, and were polymerized in dark or u nder illumination of white fluorescent lamps using crushed silica gel as seeds of polymerizati on. Infrared spectra, diffuse reflectance spectra, ESR under illumination of visi b le light were measured. Their catalytic activities, using Pt as a co-catalyst, were measured by illuminat i ng visible light in the wavelength region of 480∼700 nm, and analyzing the reactio n products from the reactant consisting of 1: 1 water-2-propanol. The amount of alkyl gro u ps left in the polymer after condensation polymerization reaction varies with the different polymeriz ation conditions. The amount of alkyl group strongly affects the light absorption w avelength and the generation of paramagnetic species when illuminated by visible light. If platinum, manganese ions, etc. are added to the polymer, the electronic orbitals of those ions are contributed to the molecular orbital of the polymer molecule. Therefore, the excited el e ctrons or holes formed by light illumination move in the molecular orbital toward the m e tal ion site. It will be concluded that a sort of potential gradient toward those metal ions (Pt, Mn, and V) exists in the polymer and that the presence of such potential gradient endo ws the titanium containing polymer with photocatalytic activities for photodecomposition of alcohol to hydrogen by visible light.

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Mass spectra of various phthalocyanines (metal free, magnesium, manganese, iron, cobalt, nickel, copper, zinc, tin, platinum, lead, chloroaluminum, chlorogallium, chloroind i urn, dichlorogermanium, dichlorotin, dichlorozirconium, oxovanadium, oxotitanium, dilithium, disodium, and fluorochromium) have been measured. In the cases of Mg, Ni, and Cu systems, protonated molecular ions, [M+H]⁺ could be detected (M represents the molecule). The unstability of oxovanadium and oxotitanium phthalocyanines is caused from th e bonding oxygen with the metal element.
In the case of AlCl (p c ) (pc represents phthalocyaninato), chlorine substituted pseudomolecular ion [AlCl(pc)+(Cl-H)]⁺ could be detected. With excess Cl or Cl₂, various phthalocyanines were reacted to give (A+ mCl+pc+n(Cl-H)⁺_m=0-20=0-16 (A, Cl, and (Cl-H) re p r esent the residue of the phthalocyanine ring, additive chlorine, and substitutive chlorin e with the hydrogen of the phthalocyanine ring, respectively. m Is the number of the addi t i v e chlorine and n is the number of the substitutive chlorine with the hydrogen of the p h thalocyanine ring). The origin of the ion, [AlCl(pc)+(Cl-H)]⁺ is considered to result from the reaction of AlCl(pc) and Clor Cl₂ produced by the thermal decomposition of AlCl(pc). The number sequence of Clwhich reacted with the metal phthalocyanine w as obtained as described below.
VO(2) < H2(3) < Mn (4) < TiO(5) < Ni (9) < Pt (11) < Co ( 16), Cu ( 16), AlCl(16), GaCl(16), InCl, SiCl₂(16), GeCl₂(16), SnCl₂(16), ZrCl₂(16) < Fe(17), Zn(17) < Sn(18), Pb(18).
The number sequence of additive chlorine with the metal phthalocyanine was obtained as described below, Mn(1). Fe(1). Zna) < Pt(2). Sn(2), Pb(2).

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The cytotoxic activities of the organometallic compounds for L-1210 mouse leukemic cells have been studied.
The organ o metallic compounds were prepared from a reaction mixture of alkylidenetriphenylphosphorane, (C₆H₅)₃P=CH-R (R: H, Me, i-Pr), and CuCl, (C₆H₅)₃PA uCI, BeCl₂, MgCl₂, AlCl₃, GaCl₃, InCl₃, (C₆H₅)₃GeCl, (C₆H₅)₃SnCl or (C₆H₅)₃PbC1. L-1210 cells suspended in RPMI 1640 medium with 10% new born calf serum were inoculated into the wells and, 3 h later, the drugs dissolved in phosphate buffer solution saline were add ed successively. Two wells were used for each drug concentration. The incubation was done at 37°C for 72 h in a humidified atmosphere of 5% CO₂. Viable cells were then coun ted with hemocytomator by Trypan Blue dye excultion, and the cytotoxic activity of dru gs was measeured by determining IC₅₀, which was obtained by plotting the drug concentration v s. the growth inhibition ratio (percentage of control) of the treated cells.
The order of the cytotoxic activities of the organometallic compou n ds is as follows:
Pb, Sn, Au > In, Al, Ga > Cd, Hg > Be, Zn > Mg > Ge, Cu
Thus, organolead, organotin and organogold compounds have strong cytotoxic activities.

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Aluminum coating on carbon materials by thermal decomposition of triisobutylaluminum in diphenylmethane improved the, , wetting of carbon by aluminum m e t a l, obviated the formation of aluminum carbide, which deteriorated aluminum-carbon composite materials, and achieved the uniform coating.
Carbon materials were co a t e d with aluminum by a thermal decomposition of 15% solution of triisobutylaluminurn in diphenylmethane at about 220°C. Before coating, the c arbon materials were treated with H₂SO₄-K₂Cr₂O₇ sensitized by SnCl₂ and` subsequently activated by PdCl₂ in order to deposit aluminum on the carbon materials but not on the su r f ace of the reactor. The surface of the coated carbon materials and the cross section of the coate d carbon fibers were investigated by scanning electron microscope (SEM) and electron p r obe microanalyzer (EPMA), indicating the uniform coating of carbon materials with aluminum.
The coated carbon black was hot pressed, in some cases together with aluminum p owder, at 70 a tm and 600°C in vacuum for ten minutes to form aluminum-carbon cylindrical composites with 1 cm of diam eter and 0.84 cm of height. For the sake of comparison, uncoate d carbon black and aluminum powder were hot pressed under the same conditions, where the carbon black and the aluminum metal were kept in the constant ratio. Several clefts werefound in the composites using uncoated carbon black, but not in t he case using the coated carbon black. The compressive strengths of these composites were measured by autograph at cross head speed of 20 mmimin.
The average compressive strength of the coated carbon black composites was 368 kg/cm2, which was about twice as strong as that of the uncoated carbon b l a c k composites (168 kg/cm²). The compressive strength decreased with an increase in the ratio of aluminum powder.
The form ation of aluminum carbide by the reaction of carbon with aluminum was investigated by x-ray diffraction study and GC analysis. Only a trace amount of aluminum carbide was found in the aluminum-carbon composites.

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