01985nas a2200277   4500008004100000022001400041245011000055210006900165260007400234300001200308490000800320520103100328653001601359653001101375653001301386653002401399653001401423653001701437100002701454700002401481700002001505700002501525700002001550700001701570856012001587       2007                        eng d  a1520-610600aNCL-7, a novel all silica analog of polymorph B rich member of BEA family: synthesis and characterization0 aNCL7 a novel all silica analog of polymorph B rich member of BEA  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbJapan Assoc ZeolitescAPR  a108-1140 v1013 a<p>{Polymorph B-rich BEA type structure, NCL-7, was synthesized using hydrothermal method in fluoride medium using perchloric acid as promoter. The samples were characterized using XRD, low temperature N-2-adsorption and Si-29 MASNMR. As the structure of beta is highly disordered Rietveld refinement of powder XRD patterns is precluded. Phase composition is derived using the simulated patterns for the random intergrowths of polymorph A and B by DIFFaX. The stacking direction c' is perpendicular to the a'b' plane of the layer. The composition of polymorph B is found to be ca. 60-65%. Two other structures namely NCL-5 and NCL-6 with varying degree of polymorph B enrichment were also synthesized. Synthesis parameters such as effect of H2O/SiO2, TEAOH/SiO2, HClO4/SiO2 and crystallization temperature were studied thoroughly. The present article explains for the first time the synthesis and characterization of NCL-7, an analog of BEA type family with enrichment of polymorph B and its comparison with normal beta (*</p>10aB-polymorph10aDIFFaX10aPromoter10aReitveld refinement10asynthesis10azeolite beta1 aKadgaonkar, Mahesh, D.1 aKasture, Mahesh, W.1 aBhange, Deu, S.1 aJoshi, Praphulla, N.1 aRamaswamy, Veda1 aKumar, Rajiv  uhttps://library.ncl.res.in/content/ncl-7-novel-all-silica-analog-polymorph-b-rich-member-bea-family-synthesis-and-002437nas a2200301   4500008004100000022001400041245011900055210006900174260007300243300001000316490000800326520141300334653001501747653001001762653001001772653001001782653002701792653001401819653001301833100002701846700002401873700002001897700002501917700002001942700002401962700001701986856013202003       2007                        eng d  a1387-181100aSynthesis and characterization of NCL-5, NCL-6 and NCL-7: new zeolites enriched with polymorph B of the BEA family0 aSynthesis and characterization of NCL5 NCL6 and NCL7 new zeolite  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcSEP  a82-880 v1053 a<p>The synthesis of all-silica analogs of polymorph B-enriched zeolites of the BEA family denoted as NCL-5, NCL-6 and NCL-7 was realized hydrothermally at lower water content in fluoride medium using perchloric acid as promoter and terraethylammonium hydroxide as template. The present article explains the effect of different synthesis parameters on NCL-5, NCL-6 and NCL-7. The samples were characterized using XRD, low temperature N-2-adsorption, Si-29 MAS NMR and FTIR spectroscopy. The phase composition of the structures was derived using simulated patterns for the random intergrowths of polymorphs A and B using DIFFaX Code. The stacking direction c' is perpendicular to the a'b' plane of the layer. The phase composition of polymorph B derived using DIFFaX code was found to be 90-95%. 70-75% and 60-65% in NCL-5, NCL-6 and NCL-7, respectively. The gradual decrease of polymorph B concentration in these samples showed a correlation with the decrease in water/SiO2 molar ratio in gel. The framework FTIR spectral analysis of NCL-5 and all-silica-beta supported the postulation that significant enrichment of polymorph B in NCL-5 compared to that in all-silica-beta, as indicated by the relative intensities of pair of bands at 1097 and 1018 cm(-1) and 460 and 423 cm(-1) vibrations, leads to more tortuous channel structure associated with polymorph B. (C) 2007 Elsevier Inc. All riahts reserved.</p>10aBEA family10aNCL-510aNCL-610aNCL-710apolymorph B enrichment10asynthesis10azeolites1 aKadgaonkar, Mahesh, D.1 aKasture, Mahesh, W.1 aBhange, Deu, S.1 aJoshi, Praphulla, N.1 aRamaswamy, Veda1 aGupta, Narendra, M.1 aKumar, Rajiv  uhttps://library.ncl.res.in/content/synthesis-and-characterization-ncl-5-ncl-6-and-ncl-7-new-zeolites-enriched-polymorph-b-bea-001891nas a2200229   4500008004100000022001400041245014400055210006900199260007300268300001200341490000800353520100000361653002501361653002801386653002501414653001301439653001701452100002001469700002401489700001801513856013001531       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<p>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.</p>10aCoordination polymer10aMetal-organic framework10aMicroporous material10aporosity10aZinc complex1 aChandra, Debraj1 aKasture, Mahesh, W.1 aBhaumik, Asim  uhttps://library.ncl.res.in/content/new-microporous-mof-material-based-znii-polycarboxylate-coordination-polymer-synthesized-0