02134nas a2200169 4500008004100000022001400041245016200055210006900217260007100286300001400357490000700371520140700378100001801785700001801803700001701821856012601838 2007 eng d a0888-588500aEco-friendly, selective hydroxylation of C-7 aromatic compounds catalyzed by TS-1/H2O2 system under solvent-free solid-liquid-liquid-type triphase conditions0 aEcofriendly selective hydroxylation of C7 aromatic compounds cat a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcDEC a8657-86640 v463 a

Direct ring hydroxylation of aromatics, namely, anisole, toluene, and benzylchloride, using TS-1 catalyst, a MFI-type titanium silicate molecular sieve, dilute H2O2 as oxidizing agent, and water as reaction medium, was investigated under solid-liquid-liquid (SLL)-type triphase conditions. The aim was to study the relative influence of commonly used organic solvents, under solid-liquid (SL)-type biphase reaction conditions, as compared to that of water, on the conversion and product selectivity. Under solvent-free triphase conditions, the ring hydroxylation of anisole, toluene, and benzylchloride leads to significant enhancement in the conversion, turn-over frequency, and para-selectivity. However, in the case of benzyl chloride, no ring hydroxylation took place under biphase conditions (using acetone as solvent) contrary to significant ring hydroxylation (ca. 60% H2O2 efficiency) under triphase aqueous medium conditions. The simple product recovery (phase separation of organic and aqueous layers) and use of water as reaction medium are other advantages. Since TS-1 is relatively hydrophobic, the reaction is hindered in the presence of organic solvents as they compete favorably with the substrate for diffusion inside the TS-1 channels. However, in the presence of water, the organic substrate competes favorably with water, leading to increased conversion and para-selectivity.

1 aMukherjee, P.1 aBhaumik, Asim1 aKumar, Rajiv uhttp://library.ncl.res.in/content/eco-friendly-selective-hydroxylation-c-7-aromatic-compounds-catalyzed-ts-1h2o2-system-001890nas a2200229 4500008004100000022001400041245014400055210006900199260007300268300001200341490000800353520100000361653002501361653002801386653002501414653001301439653001701452100002001469700002401489700001801513856012901531 2008 eng d a1387-181100aNew microporous MOF material based on Zn(II)-polycarboxylate coordination polymer synthesized with the aid of 1,6-diaminohexane as template0 aNew microporous MOF material based on ZnIIpolycarboxylate coordi aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcDEC a204-2090 v1163 a

A new microporous metal-organic framework (MOF) material ZBTEC-1 has been synthesized by designing infinite coordination polymer network formed between Zn(II) and 1,2,4,5-benzenetetracarboxylic acid (BTEC) under solvothermal conditions in the presence of 1,6-diaminohexane (DAH) as a single molecule template. Powder XRD data demonstrate that the ZBTEC-1 material has a new MOF structure. N-2 sorption studies indicated moderately good surface area (306 m(2) g(-1)) with large size micropores (average pore diameter ca. 0.7 nm) and very high pore volume (1.93 ccg(-1)). C-13 solid state MAS-NMR, FT-IR and UV-visible spectroscopic studies showed the presence of BTEC moieties in the framework. TEM and FE-SEM analysis indicated 30-60 nm diameter size microporous spherical particles for the ZBTEC-1 crystallites. This novel MOF material showed good hydrogen adsorption capacity at 77 K, indicating its potential application in hydrogen storage. (C) 2008 Elsevier Inc. All rights reserved.

10aCoordination polymer10aMetal-organic framework10aMicroporous material10aporosity10aZinc complex1 aChandra, Debraj1 aKasture, Mahesh, W.1 aBhaumik, Asim uhttp://library.ncl.res.in/content/new-microporous-mof-material-based-znii-polycarboxylate-coordination-polymer-synthesized-002604nas a2200265 4500008004100000022001400041245011500055210006900170260007300239300001200312490000800324520164200332653003001974653001402004653003502018653003602053653001402089100001902103700001702122700001602139700001302155700002402168700001802192856012802210 2009 eng d a1387-181100aIncorporation of tin in different types of pores in SBA-15: synthesis, characterization and catalytic activity0 aIncorporation of tin in different types of pores in SBA15 synthe aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcDEC a234-2440 v1263 a

Mesoporous Sn-SBA-15 has been synthesized by three different methods Such as conventional hydrothermal route, using cocatalyst NH4F and in the presence of organosilane precursor. All the materials are thoroughly characterized by powder X-ray diffraction (XRD), SEM. TEM. N-2 sorption and surface area measurements, diffuse-reflectance UV-visible and FTIR spectroscopy. TG-DTA and elemental analysis through ICP. Nitrogen adsorption data, XRD patterns, and TEM observations Suggests that the textural properties are retained during the isomorphous substitution of silicon by tin. ICP chemical analysis indicates that tin can be substituted in the range of S-l/S-n = 69-162. UV-visible spectra of samples synthesized by the cocatalytic approach exhibit unique absorption band at 213 nm characteristics of tin atom substituted in the smaller pores (2-3 nm) located inside the walls of mesopores. Further, an additional band at 224 nm can be assigned to Sri atoms located in the distorted tetrahedral position along the primary mesopores. In contrary, only one absorption band centered at 224 nm is observed for all the samples synthesized by conventional hydrothermal as well as in the presence of organosilane precursor. F-19 NMR spectra confirmed (no signal) the absence of occluded F- ions in the samples made with NH4F. Observed high catalytic activity in Baeyer-Villiger oxidation and Meerwin-Pondorf-Verly reduction under the liquid-phase conditions suggest the incorporation of a portion of tin in the smaller pores for the Sn-SBA-15 materials synthesized through cocatalyst method. (C) 2009 Elsevier Inc. All rights reserved.

10aBaeyer-Villiger oxidation10acatalysis10aFunctionalization of mesopores10aMeerwin-Pondorf-Verly reduction10aSn-SBA-151 aSasidharan, M.1 aKiyozumi, Y.1 aMal, N., K.1 aPaul, M.1 aRajamohanan, P., R.1 aBhaumik, Asim uhttp://library.ncl.res.in/content/incorporation-tin-different-types-pores-sba-15-synthesis-characterization-and-catalytic-001576nas a2200205 4500008004100000022001400041245010000055210006900155260011000224300001400334490000700348520076800355100001901123700001801142700002401160700002101184700002001205700001801225856012701243 2010 eng d a1463-907600aNew organic-inorganic hybrid microporous organosilica having high metal ion adsorption capacity0 aNew organicinorganic hybrid microporous organosilica having high aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcJUL a9389-93940 v123 a

A new microporous organic-inorganic hybrid organosilica LHMM-2 containing a bis(propyliminomethyl)benzene moiety inside the framework has been synthesized hydrothermally without using any template or structure-directing agent. Powder XRD and TEM image analyses suggest a new disordered microporous structure with pores of dimension ca. 0.54 nm, and C-13 and Si-29 MAS NMR and spectroscopic results indicate the presence of bridging organic bis(propyliminomethyl) benzene moiety in this framework. TPD-NH3 results suggested that nearly 5 times as much bis(propyliminomethyl) benzene moiety is located inside the micropore walls (matrix) than in the surface of the pores. LHMM-2 shows very high adsorption capacity for metal cations like Fe3+, Cu2+ and Zn2+.

1 aPaul, Manidipa1 aPal, Nabanita1 aRajamohanan, P., R.1 aRana, Bharat, S.1 aSinha, Anil, K.1 aBhaumik, Asim uhttp://library.ncl.res.in/content/new-organic-inorganic-hybrid-microporous-organosilica-having-high-metal-ion-adsorption-001573nas a2200193 4500008004100000022001400041245012400055210006900179260011000248300001400358490000700372520077000379100002201149700002001171700002101191700002001212700001801232856012901250 2012 eng d a1477-922600aNitrogen-rich porous covalent imine network (CIN) material as an efficient catalytic support for C-C coupling reactions0 aNitrogenrich porous covalent imine network CIN material as an ef aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcDEC a1304-13110 v413 a

In an effort to expand the realm of possibilities of nitrogen-rich porous materials that could be used in catalysis, herein we report the synthesis of a new highly nitrogen rich (ca. 45%) porous covalent imine network (CIN-1) material employing simple Schiff base chemistry and further grafting its surface with palladium. Pd-loaded CIN-1 support acts as a truly heterogeneous catalyst towards Suzuki C-C coupling reaction between aryl halides with arylboronic acids. High surface area and excellent accessibility of the catalytic sites make it very efficient for heterogeneous catalysis. The stability of the catalyst due to intimate contact between nitrogen-rich organic support and metal allows several reuses with only a minor loss in catalytic activity.

1 aBhunia, Manas, K.1 aDas, Swapan, K.1 aPachfule, Pradip1 aBanerjee, Rahul1 aBhaumik, Asim uhttp://library.ncl.res.in/content/nitrogen-rich-porous-covalent-imine-network-cin-material-efficient-catalytic-support-c-c-0