Xn:Harmful;
7553-56-2Relevant articles and documents
Multiple oscillations observed in the rotational state population of I2(B) formed in the photodissociation of (I2)2
Philippoz, J.-M.,Monot, R.,Bergh, H. van den
, p. 288 - 291 (1990)
Several oscillations are observed in the rotational state population of I2B 3Π(Ou+) produced in the photodissociation (I2)2 + hν -> I2(Bυ',J') + I2(X).The initial excitation is above the dissociation limit of th
Variable dimensionality in 'hollow' hybrid tin iodide perovskites
Lightfoot, Philip,McNulty, Jason A.,Slawin, Alexandra M. Z.
, p. 15171 - 15174 (2020)
Two 'hollow' B-site deficient perovskites, (TzH)11(H3PO2)Sn6I23 and (TzH)3Sn2I7 (TzH+ = 1,2,4-triazolium, H3PO2 = hypohosphorous acid), have been prepared. (TzH)11(H3PO2)Sn6I23 is the first example of a 2D layered structure of this type. Leaving the same reaction mixture for an extended time also affords the 3D derivative (TzH)3Sn2I7.
Formation of molecular iodine from the two-photon dissociation of CI4 and CHI3: An experimental and computational study
Tweeten, Eric D.,Petro, Benjamin J.,Quandt, Robert W.
, p. 19 - 24 (2003)
The formation of electronically excited molecular iodine from the two-photon photodissociation of CI4 and CHI3 was investigated using dispersed fluorescence and ab initio calculations. Molecular iodine was formed in the D, D', and E
LOW-TEMPERATURE SYNTHESIS OF NOVEL LAYERED ALKALI METAL-MoO3 BRONZES AND HEXAGONAL BRONZES OF THE TYPE KyW1 - xMoxO3.
Ganguli,Ganapathi,Gopalakrishnan,Rao
, p. 228 - 231 (1988)
A new class of layered alkali metal-MoO//3 bronzes, A//xMoO//3 (A equals Li, Na, K, Rb), with nearly the same unit cell parameters as the host oxide has been synthesized. This was accomplished by the solid state reaction of MoO//3 with alkali metal iodides around 575 K; Li//xMoO//3 absorbs H//2O causing an increase in the b parameter of the unit cell. Hexagonal potassium bronzes of W//1// minus //xMo//xO//3 are synthesized for the first time.
Cluster-induced photochemistry of CH3I at 248 nm
Fan, Y. B.,Donaldson, D. J.
, p. 189 - 196 (1992)
We have carried out a systematic study of the 248 nm excimer-laser photodissociation of small methyl iodide clusters in a free jet expansion.Ground electronic state I2 is formed from the photolysis of methyliodide dimers and detected via the laser induced fluorescence (LIF) excitation spectrum of the (B-X) transition.The internal energy of the I2 is approximately 2.5 kJ/mol and is the same for CH3I seeded in CO2, Ar, Xe, O2, and He, as well as for the neat expansion and deuterated sample.A room temperature flow cell experiment shows that the reaction channel I* + CH3I -> I2 + CH3I does not contribute to the measured I2 signal.The results strongly imply that a cluster-induced cooperative effect is responsible for the I2-producing chemistry.
Synthesis, characterisation and structural investigations of iodine-doped indium(III) and zirconium(IV) diphthalocyanines: [InPc2]I2 and [ZrPc2]I2
Janczak, Jan,Idemori, Ynara Marina
, p. 85 - 93 (2001)
Crystals of iodine-doped indium(III) and zirconium(IV) diphthalocyanines, [InPc2]I2 and [ZrPc2]I2, were grown directly in the reaction of In-Tl alloy or zirconium powder with 1,2-dicyanobenzene under a stream of iodine at about 200°C. Both partially oxidised diphthalocyaninato complexes crystallise in the P4/mcc space group of the tetragonal system with one molecule per unit cell. The space group of P4/mcc requires that the central metal ions are disordered in these structures. The crystal structures shown columnar pseudo-one-dimensional stacks of [InPc2] or [ZrPc2] units with a non-integral charge and linear chains of symmetrical triiodide I3- ions, which were detected by a Raman spectroscopy. The pseudo-one-dimensional aggregates of [InPc2]2/3+ or [ZrPc2]2/3+ as well as the chains of I3- ions are aligned along the [001] direction. The formal oxidation state of the Pc macrorings equals to ? -1.167 and ? -1.667 in indium(III) and zirconium(IV) diphthalocyaninato complexes. The EPR measurement shows a single sharp EPR line at g = 2.0028 and 2.0026 for the indium and zirconium complexes, respectively. The conductivity measurement on polycrystalline samples at room temperature equals 2.7-3.1 × 10-2 and 5.2-5.5 × 10-2 Ω-1 cm-1 for [InPc2]I2 and [ZrPc2]I2, respectively. The charge transport proceeds mainly along the pseudo-one-dimensional [MPc2]2/3+ aggregates. Both iodine-doped metallodiphthalocyaninato complexes exhibit non-metallic character in conductivity (dσ/dT > 0).
Vapor pressure over KI-CoI2 melts
Kritskaya,Burylev,Moisov,Kostenko
, p. 202 - 206 (2004)
The vapor pressure in the KI-CoI2 system is determined by isobaric boiling point measurements. Calculated vapor pressure isotherms of the KI-CoI2 system show negative deviations from linearity. The vapor composition over pure CoIsub
Chemical generation of atomic iodine for the chemical oxygen-iodine laser. II. Experimental results
?palek, Otomar,Jirásek, Vít,Kodymová, Jarmila,Jakubec, Ivo,Hager, Gordon D.
, p. 147 - 157 (2002)
A new method for the chemical generation of atomic iodine intended for use in a chemical oxygen-iodine laser (COIL) was investigated experimentally. The method is based on the fast reaction of hydrogen iodide with chemically produced chlorine atoms. Effects of the initial ratio of reactants and their mixing in a flow of nitrogen were investigated experimentally and interpreted by means of a computational model for the reaction system. The yield of iodine atoms in the nitrogen flow reached 70-100% under optimum experimental conditions. Gain was observed in preliminary experiments on the chemical generation of atomic iodine in a flow of singlet oxygen.
LASER INDUCED REACTION OF I(2P1/2) YIELDING I2(B3Πou+)
Stephan, K. H.,Comes, F. J.
, p. 259 - 262 (1980)
The photolysis of n-C3F7I in the uv yields I (2P1/2) with a quantum yield of nearly 1 (ref. 1).The I(2P1/2) decay by spontaneous emission, in collisions with the n-C3F7I by spin-orbit relaxation, and by a three body reaction with the newly formed I(2P3/2), yielding I2(B3?ou+).For the latter process the rate constant was determined to be k3=(10+/-5)*1E-33cm6 molec.-2s-1 Further an upper limit of the rate constant for a possibile bimolecular reaction of I(2P1/2) with n-C3F7I yielding I2 (X1Σog+) is given k53 molec.-1s-1
On the chemical and electrochemical one-electron reduction of peroxynitrous acid
Kurz, Christophe,Zeng, Xiuqiong,Hannemann, Stefan,Kissner, Reinhard,Koppenol, Willem H.
, p. 965 - 969 (2005)
Peroxynitrous acid was reduced by cathodic linear sweep voltammetry at a gold electrode and by iodide at pH 3.2 and 5.6. The cathodic reduction wave was identified by measuring its decay in time, which was the same as observed by optical spectroscopy. The iodide oxidation was followed by optical measurement of the triiodide formation. Both reductions show one-electron stoichiometry, with the product nαα = 0.23 ± 0.04 from the electrochemical experiments, in which α is the transfer coefficient and na the number of electrons transferred, and an diiodine yield of ca. 0.5 equiv per equivalent of peroxynitrous acid. The voltammetric reduction was irreversible up to scan rates of 80 V s-1. Both reductions were pH independent in the range studied. The voltammetric reduction is most likely an irreversible elemental reaction followed by a chemical decay that cannot be observed directly. Because of the pH independence, we conclude that both reductions have a common short-lived intermediate, namely [HOONO]-. We estimate the electrode potential of the likely ONOOH/ONOOH- couple to be larger than 1 V. The commonly used electrode potential E°(ONOOH, H +/NO2, H2O) does not describe the chemistry of peroxynitrous acid.
