01448nas a2200145 4500008004100000022001400041245010300055210006900158260011500227300001000342490000700352520079200359100001901151856013201170 2005 eng d a0019-452200aSynthesis and characterization of a novel extra large pore aluminophosphate molecular sieve, NCL-60 aSynthesis and characterization of a novel extra large pore alumi a92 ACHARYA PRAFULLA CHANDRA RD ATTN:DR INDRAJIT KAR/EXEC SEC, CALCUTTA 700009, INDIAbINDIAN CHEMICAL SOCcJAN a77-780 v823 a

A novel extra large pore aluminophosphate molecular sieve NCL-6, has been prepared and characterized by various techniques such as XRD, SEM, TG/DTA, carbon and nitrogen analysis, FT-IR and MAS NMR are reported. X-Ray diffraction pattern shows that the synthesized sample is crystalline and have novel structure. SEM analysis indicate the phase purity and having granules morphology with 3 x 5 mum particle size. FT-IR spectrum in the framework region shows that the sample is similar to the other known aluminophosphates. TG/DTA shows that the sample losses 30.45% due to the loss of water and organic molecules. Aluminium and phosphorous NMR shows that the presence of four different aluminium and three different phosphorous sites. The NMR are similar to VPI-5, NCL-2 and NCL-3.

1 aVenkatathri, N uhttps://library.ncl.res.in/content/synthesis-and-characterization-novel-extra-large-pore-aluminophosphate-molecular-sieve-ncl-002018nas a2200157 4500008004100000022001400041245010900055210006900164260010600233300001400339490000700353520134400360653000801704100001901712856012901731 2005 eng d a0025-540800aSynthesis and NMR characterization of SAPO-35 from non-aqueous systems using hexamethyleneimine template0 aSynthesis and NMR characterization of SAPO35 from nonaqueous sys aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcJUL a1157-11650 v403 a

SAPO-35 was synthesized using hexamethyleneimine template in non-aqueous systems. X-ray diffraction and scanning electron micrograph analysis shows the synthesized sample is pure and well crystalline. Presence of four stages (1.6%, 0.8%, 7.8% and 8.4%) of weight loss is observed by TG/DTA analysis. FT-IR analysis in the framework region shows the presence of tetrahedral T-O-T vibrations is similar to the other known aluminophosphate molecular sieves. FT-IR spectrum in the -OH region shows stretching vibrations at 3631, 3604 and 3580 cm(-1) can be assigned to OH groups in bigger cages near S6R, in bigger cages near D6R and those actually confined inside the D6R, respectively. The spectra for the as-synthesized sample show a single symmetrical Al-27 MAS NMR line at delta = 36.26 indicating the presence of a single tetrahedral aluminium species. Where as Si-29 and P-31 MAS NMR shows the presence of two peaks in both at (-89.9 and -95.15 ppm) and (-34.01 and -40.45 ppm) due to the Si substitution of P present in two different locations in double 6 ring (D6R) and in single 6 ring (S6R). Al-27 3Q-MAS NMR shows two peaks for environmentally different tetrahedral aluminium atoms. This is the first time we are showing such a fact which is not observable using ordinary MAS NMR. (c) 2005 Elsevier Ltd. All rights reserved.

10aXRD1 aVenkatathri, N uhttps://library.ncl.res.in/content/synthesis-and-nmr-characterization-sapo-35-non-aqueous-systems-using-hexamethyleneimine-001317nas a2200157 4500008004100000022001400041245012400055210006900179260007300248300001200321490000600333520066000339100001900999700001801018856012301036 2005 eng d a1566-736700aSynthesis, characterization and catalytic properties of hexagonal mesoporous vanadium aluminophosphate molecular sieves0 aSynthesis characterization and catalytic properties of hexagonal aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcMAR a177-1830 v63 a

Novel vanadium containing hexagonal mesoporous aluminophosphate molecular sieve (VHMA) have been synthesized. XRD and TEM analysis confirm the phase purity of the synthesized samples. FT-IR analysis suggests the incorporation of V4+ in the aluminophosphate framework. ESR, UV-Vis spectroscopic techniques and cyclic voltammetric studies confirm the incorporation of vanadium and reveal its presence of tetrahedral and square pyramidal environments in the as-synthesized samples. Cyclic voltammetry reveals the presence of two redox couples in VHMA. This catalyst is found to be a good oxidation catalyst. (C) 2005 Elsevier B.V. All rights reserved.

1 aVenkatathri, N1 aSrivastava, R uhttps://library.ncl.res.in/content/synthesis-characterization-and-catalytic-properties-hexagonal-mesoporous-vanadium-001415nas a2200241 4500008004100000022001400041245012900055210006900184260008900253300001200342490000700354520056900361653001200930653001000942653002000952653001600972653001100988653000800999653001101007653000801018100001901026856012801045 2005 eng d a0022-445600aSynthesis of high silica content silicoaluminophosphate-5 (SAPO-5) from non-aqueous medium using hexamethyleneimine template0 aSynthesis of high silica content silicoaluminophosphate5 SAPO5 f aDR K S KRISHNAN MARG, NEW DELHI 110 012, INDIAbNATL INST SCIENCE COMMUNICATIONcJUL a509-5140 v643 a

Silicoaluminophosphate-5 (SAPO-5) molecular sieve with up to 2.4 Si atom per unit cell have been synthesized using hexamethyleneimine template in ethylene glycol medium (molar ratio of silica in the reaction gels up to 0.3). Crystallinity and silicon incorporation are confirmed by XRD, XRF, N, sorption study, TG/DTA, SEM. pyridine TPD technique and hydroxyl region FT-IR. These materials with high Si concentration show higher activity for toluene alkylation reaction than samples prepared with up to 0.1 molar ratio of silica in the gel of aqueous media.

10aaqueous10aFT-IR10ahydroxyl region10anon-aqueous10aSAPO-510aSEM10aTG/DTA10aXRD1 aVenkatathri, N uhttps://library.ncl.res.in/content/synthesis-high-silica-content-silicoaluminophosphate-5-sapo-5-non-aqueous-medium-using-0