02300nas a2200169 4500008004100000022001400041245013300055210006900188260007100257300001600328490000800344520158800352100002701940700001701967700002001984856012602004 2011 eng d a0002-786300aHelical water chain mediated proton conductivity in homochiral metal-organic frameworks with unprecedented zeolitic unh-topology0 aHelical water chain mediated proton conductivity in homochiral m a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcNOV a17950-179580 v1333 a

Four new homochiral metal-organic framework (MOF) isomers, [Zn(l-L-Cl)(Cl)](H2O)(2) (1), [Zn(l-L-Br)(Br)]-(H2O)(2) (2), [Zn(d-L-Cl)(Cl)(H2O)(2) (3), and [Zn(d-L-Br)-(Br)] (H2O)(2) (4) [L = 3-methyl-2-(pyridin-4-ylmethylamino)-butanoic acid], have been synthesized by using a derivative of L-/D-valine and Zn(CH3COO)(2)center dot 2H(2)O. A three-periodic lattice with a parallel ID helical channel was formed along the crystallographic c-axis. Molecular rearrangement results in an unprecedented zeolitic unh-toparigy in 1-4. In each case, two lattice water molecules (one H-bonded. to halogen atoms) form a secondary helical continuous water chain inside the molecular helix. MOFs 1 and 2 shows different water adsorption properties and hence different water affinity. The arrangement of water molecules inside the channel Was monitored by variable temperature single crystal X-ray diffraction, which indicated that MOF 1 has a higher water holding capacity than MOF 2. In MOF 1, water escapes. at 80 degrees C, while in T the same happens at a much lower temperature (similar to 40 degrees C). All the MOFs reported here shows reversible crystallization by readily reabsorbing moisture. In MOFs 1 and 2, the frameworks are stable after solvent removal, which is confirmed by a single-crystal to single crystal transformation. MOFs 1 and 3 show high proton conductivity of 4.45 x 10(-5) and 4.42 x 10(-5) S cm(-1), respectively, while 2 and 4 shows zero proton conductivity. The above result is attributed to the fact that MOF 1 has a higher water holding capacity than MOF 2.

1 aSahoo, Subash, Chandra1 aKundu, Tanay1 aBanerjee, Rahul uhttps://library.ncl.res.in/content/helical-water-chain-mediated-proton-conductivity-homochiral-metal-organic-frameworks-001280nas a2200193 4500008004100000022001400041245011800055210006900173260011000242300001400352490000700366520048800373100002400861700002500885700002100910700002100931700002000952856011400972 2011 eng d a1466-803300aHydrogen bond directed honeycomb-like porous network structure of tris (bipyridyl-glycoluril)cobalt(III) chloride0 aHydrogen bond directed honeycomblike porous network structure of aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcJUL a5289-52910 v133 a

The [Co(bpg)3]Cl-3 complex (1), where bpg = 4b, 5, 7, 7a-tetrahydro4b,7a-epiminomethan-oimino-6H-imidazo [4,5-f][1,10]-phenanthroline-6,13-dione has been synthesized and characterized by various spectroscopic techniques and single crystal X-ray diffraction. The combination of bipyridyl-glycoluril (bpg) ligands and cobalt ion self-organise to form a honeycomb-like porous network structure resulting in the formation of zeolite like channels which adsorb gases, is described.

1 aKawade, Vitthal, A.1 aKumbhar, Avinash, S.1 aErxleben, Andrea1 aPachfule, Pradip1 aBanerjee, Rahul uhttps://library.ncl.res.in/content/hydrogen-bond-directed-honeycomb-porous-network-structure-tris-bipyridyl-000846nas a2200229 4500008004100000022001400041245008700055210006900142260007700211300001600288490000700304653001900311653002400330653002300354653002900377653001800406100002000424700001800444700002200462700002000484856011200504 2013 eng d a1433-785100aHydrolytic conversion of a metal-organic polyhedron into a metal-organic framework0 aHydrolytic conversion of a metalorganic polyhedron into a metalo aBOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANYbWILEY-V C H VERLAG GMBHcDEC a13755-137590 v5210acage compounds10acrystal engineering10ahydrophobic effect10ametal-organic frameworks10aSelf-assembly1 aMallick, Arijit1 aGarai, Bikash1 aDiaz, David, Diaz1 aBanerjee, Rahul uhttps://library.ncl.res.in/content/hydrolytic-conversion-metal-organic-polyhedron-metal-organic-framework-001535nas a2200205 4500008004100000022001400041245009900055210006900154260007500223300001200298490000700310520074200317653002801059653002701087653002801114653001901142100001701161700002001178856013101198 2014 eng d a0369-820300aHigh charge carrier mobility in two dimensional indium (iii) isophthalic acid based frameworks0 aHigh charge carrier mobility in two dimensional indium iii isoph a5 LAJPATRAI RD, ALLAHABAD 211002, INDIAbNATL ACAD SCIENCES INDIAcJUN a331-3360 v843 a

The effect of dimensionality (1D to 2D) on charge carrier mobility have been studied thoroughly on three In(III)-isophthalate based MOFs [In-IA-1D, In-IA-2D-1 and -2]. In-IA-1D possess 1D nanotubular architecture with [(CH3)(2)NH2](+). In-IA-2D-1 have 2D layers containing only [(CH3)(2)NH2](+) cations. Whereas, In-IA-2D-2 have [(CH3)(2)NH2](+) cations as well as solvent DMF molecule inside the crystal structure. Due to presence of the pi-pi stacking arrangement among the phenyl rings of IA moieties facilitates the high charge carrier mobility (4.6 x 10(-3) cm(2) V-1 s(-1) at V-G = -40 V) in In-IA-2D-2. However, In-IA-1D and In-IA-2D-1 does not show any charge carrier mobility due to absence of pi-pi stacking arrangement.

10aCharge carrier mobility10aCoordination chemistry10ametal organic framework10api-pi stacking1 aPanda, Tamas1 aBanerjee, Rahul uhttps://library.ncl.res.in/content/high-charge-carrier-mobility-two-dimensional-indium-iii-isophthalic-acid-based-frameworks-000786nas a2200181 4500008004100000022001400041245011800055210006900173260011000242300001400352490000700366520001900373100002100392700002400413700002200437700002000459856012500479 2014 eng d a1359-734500aHighly stable covalent organic framework-Au nanoparticles hybrids for enhanced activity for nitrophenol reduction0 aHighly stable covalent organic frameworkAu nanoparticles hybrids aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcJAN a3169-31720 v503 a

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1 aPachfule, Pradip1 aKandambeth, Sharath1 aDiaz, David, Diaz1 aBanerjee, Rahul uhttps://library.ncl.res.in/content/highly-stable-covalent-organic-framework-au-nanoparticles-hybrids-enhanced-activity-001077nas a2200181 4500008004100000022001400041245007400055210006900129260011000198300001600308490000700324520037000331100002100701700002400722700002000746700002000766856010900786 2015 eng d a1359-734500aHollow tubular porous covalent organic framework (COF) nanostructures0 aHollow tubular porous covalent organic framework COF nanostructu aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcJUN a11717-117200 v513 a

Hollow and tubular TpPa-COF structures have been synthesized by template-assisted replication of nanometer sized ZnO-nanorods. The hollow structures composed of microporous TpPa shells have high periodicity, moderate porosity, chemical stability and capsule shaped morphology as revealed by X-ray diffraction, porosity measurements, and SEM and TEM analyses.

1 aPachfule, Pradip1 aKandmabeth, Sharath1 aMallick, Arijit1 aBanerjee, Rahul uhttps://library.ncl.res.in/content/hollow-tubular-porous-covalent-organic-framework-cof-nanostructures-001928nas a2200181 4500008004100000022001400041245010300055210006900158260007100227300001400298490000700312520120800319100002101527700002001548700002001568700003101588856012701619 2016 eng d a0020-166900aHigh loading of pd nanoparticles by interior functionalization of mofs for heterogeneous catalysis0 aHigh loading of pd nanoparticles by interior functionalization o a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcMAR a2345-23540 v553 a

In this report, the issue related to nanoparticle (NP) agglomeration upon increasing their loading amount into metal-organic frameworks (MOFs) has been addressed by functionalization of MOFs with alkyne groups. The alkynophilicity of the Pd2+ (or other noble metals) ions has been utilized successfully for significant loading of Pd NPs into alkyne functionalized MOFs. It has been shown here that the size and loading amount of Pd NPs are highly dependent on the surface area and pore width of the MOFs. The loading amount of Pd NPs was increased monotonically without altering their size distribution on a particular MOF. Importantly, the distinct role of alkyne groups for Pe(2+) stabilization has also been demonstrated by performing a control experiment considering a MOF without an alkyne moiety. The preparation of NPs involved two distinct steps viz. adsorption of metal ions inside MOFs and reduction of metal ions. Both of these steps were monitored by microscopic techniques. This report also demonstrates the applicability of Pd@MOF NPs as extremely efficient heterogeneous catalysts for Heck-coupling and hydrogenation reactions of aryl bromides or iodides and alkenes, respectively.

1 aGole, Bappaditya1 aSanyal, Udishnu1 aBanerjee, Rahul1 aMukherjee, Partha, Sarathi uhttps://library.ncl.res.in/content/high-loading-pd-nanoparticles-interior-functionalization-mofs-heterogeneous-catalysis-002663nas a2200229 4500008004100000022001400041245013900055210006900194260000900263300001400272490000800286520184200294100002802136700001602164700001902180700002202199700002102221700001902242700002202261700002002283856013002303 2021 eng d a0002-786300aHeterogeneous C-H functionalization in water via porous covalent organic framework nanofilms: a case of catalytic sphere transmutation0 aHeterogeneous CH functionalization in water via porous covalent  cJUN  a8426-84360 v1433 aHeterogeneous catalysis in water has not been explored beyond certain advantages such as recyclability and recovery of the catalysts from the reaction medium. Moreover, poor yield, extremely low selectivity, and active catalytic site deactivation further underrate the heterogeneous catalysis in water. Considering these facts, we have designed and synthesized solution-dispersible porous covalent organic framework (COF) nanospheres. We have used their distinctive morphology and dispersibility to functionalize unactivated C-H bonds of alkanes heterogeneously with high catalytic yield (42-99%) and enhanced regioand stereoselectivity (3 degrees:2 degrees = 105:1 for adamantane). Further, the fabrication of catalyst-immobilized COF nanofilms via covalent self-assembly of catalytic COF nanospheres for the first time has become the key toward converting the catalytically inactive homogeneous catalysts into active and effective heterogeneous catalysts operating in water. This unique covalent self-assembly occurs through the protrusion of the fibers at the interface of two nanospheres, transmuting the catalytic spheres into films without any leaching of catalyst molecules. The catalyst-immobilized porous COF nanofilms' chemical functionality and hydrophobic environment stabilize the high-valent transient active oxoiron(V) intermediate in water and restricts the active catalytic site's deactivation. These COF nanofilms functionalize the unactivated C-H bonds in water with a high catalytic yield (45-99%) and with a high degree of selectivity (cis:trans = 155:1; 3 degrees:2 degrees = 257:1, for cis-1,2-dimethylcyclohexane). To establish this approach's ``practical implementation'', we conducted the catalysis inflow (TON = 424 +/- 5) using catalyst-immobilized COF nanofilms fabricated on a macroporous polymeric support.1 aSasmal, Himadri, Sekhar1 aBag, Saikat1 aChandra, Bittu1 aMajumder, Poulami1 aKuiry, Himangshu1 aKarak, Suvendu1 aGupta, Sayam, Sen1 aBanerjee, Rahul uhttps://library.ncl.res.in/content/heterogeneous-c-h-functionalization-water-porous-covalent-organic-framework-nanofilms-case02677nas a2200265 4500008004100000022001400041245008300055210006900138260000900207300001400216490000700230520184900237100001902086700001602105700001702121700002502138700001602163700001702179700001602196700001902212700002602231700002002257700002002277856011402297 2023 eng d a2041-652000aHierarchical covalent organic framework-foam for multi-enzyme tandem catalysis0 aHierarchical covalent organic frameworkfoam for multienzyme tand cJUN  a6643-66530 v143 a

Covalent organic frameworks (COFs) are ideal host matrices for biomolecule immobilization and biocatalysis due to their high porosity, various functionalities, and structural robustness. However, the porosity of COFs is limited to the micropore dimension, which restricts the immobilization of enzymes with large volumes and obstructs substrate flow during enzyme catalysis. A hierarchical 3D nanostructure possessing micro-, meso-, and macroporosity could be a beneficial host matrix for such enzyme catalysis. In this study, we employed an in situ CO2 gas effervescence technique to induce disordered macropores in the ordered 2D COF nanostructure, synthesizing hierarchical TpAzo COF-foam. The resulting TpAzo foam matrix facilitates the immobilization of multiple enzymes with higher immobilization efficiency (approximately 1.5 to 4-fold) than the COF. The immobilized cellulolytic enzymes, namely beta-glucosidase (BGL), cellobiohydrolase (CBH), and endoglucanase (EG), remain active inside the TpAzo foam. The immobilized BGL exhibited activity in organic solvents and stability at room temperature (25 degrees C). The enzyme-immobilized TpAzo foam exhibited significant activity towards the hydrolysis of p-nitrophenyl-beta-d-glucopyranoside (BGL@TpAzo-foam: K-m and V-max = 23.5 +/- 3.5 mM and 497.7 +/- 28.0 mu M min(-1)) and carboxymethylcellulose (CBH@TpAzo-foam: K-m and V-max = 18.3 +/- 4.0 mg mL(-1) and 85.2 +/- 9.6 mu M min(-1) and EG@TpAzo-foam: K-m and V-max = 13.2 +/- 2.0 mg mL(-1) and 102.2 +/- 7.1 mu M min(-1)). Subsequently, the multi-enzyme immobilized TpAzo foams were utilized to perform a one-pot tandem conversion from carboxymethylcellulose (CMC) to glucose with high recyclability (10 cycles). This work opens up the possibility of synthesizing enzymes immobilized in TpAzo foam for tandem catalysis.

1 aPaul, Satyadip1 aGupta, Mani1 aDey, Kaushik1 aMahato, Ashok, Kumar1 aBag, Saikat1 aTorris, Arun1 aGowd, Bhoje1 aSajid, Hasnain1 aAddicoat, Matthew, A.1 aDatta, Supratim1 aBanerjee, Rahul uhttps://library.ncl.res.in/content/hierarchical-covalent-organic-framework-foam-multi-enzyme-tandem-catalysis