Abstract Specimens of 14 C‐labeled poly(ethylene terephthalate), nylon 66, and poly(methyl methacrylate) have been synthesized exposed, in vitro , to a number enzyme solutions. Poly(ethylene terephthalate) was found be affected by esterase papain, although different ways, but not trypsin or chymotrypsin. Nylon 66 unaffected degraded the other three. Poly(methyl any these enzymes. This indicates that some nominally stable polymers are susceptible degradation enzymes under circumstances. The...

A novel chiral metal-organic framework, [Cu4(HL)2(H2O)4(MeO)4]n (), has been successfully synthesized from a tripodal flexible ligand (2S,2'S,2''S)-2,2',2''-(benzenetricarbonyltris(azanediyl))tripropanoic acid (H3L). Compound was characterized by IR and X-ray powder diffraction analysis. The structure determined single crystal analysis revealing that possesses 3D network, featuring tetranuclear cubane-type secondary building block [Cu4(MeO)4](4+), formed via the connection of four metal ions...

Two Cu(II)-based metal–organic frameworks (MOFs) having paddle-wheel secondary building units (SBUs), namely, 1Me and 1ipr, were synthesized solvothermally using two new bent di-isophthalate ligands incorporating different substituents. The MOFs showed high porosity (BET surface area, 2191 m2/g for 1402 1ipr). For 1Me, very CO2 adsorption (98.5 wt % at 195 K, 42.9 273 23.3 298 K) 1 bar was found, while it significantly less (14.3 K bar, 54.4 50 bar). exhibited H2 uptake of 3.2 77 pressure,...

Abstract Tetrasodium p ‐sulfonatocalix[4]arene exists as a hydrate with approximately 14 water molecules and has three polymorphic modifications, all of which contain molecule in the molecular cavity that is engaged OH⋅⋅⋅π interactions. Single‐crystal neutron structures are reported for two these forms reveal “compressed” short OH bonds. Partial atomic charges hardness analysis (PACHA) calculations based on coordinates give an interaction energy 6.9–7.5 kJ mol −1 . The PACHA also reveals...

A novel 2-fold interpenetrated, pillared, cadmium metal–organic framework, namely, [Cd(HBTC)BPE]n·nDMF, has been synthesized using 1,3,5-benzenetricarboxylic acid and 1,2-bis(4-pyridyl)ethane (BPE). This compound desolvated subjected to various liquids gases for sorption studies. Structures of the as-synthesized (1), (2), resolvated in benzene (3) have determined by single-crystal X-ray diffraction analysis further characterized elemental analysis, IR spectra, thermogravimetric/differential...

The reaction of 1,3,5-benzenetricarboxylic acid (H3BTC) with ZnSO4·6H2O in a DMF–water solution afforded two new metal–organic frameworks [Zn6(μ3-OH)2(BTC)4(DMF)2.5(H2O)2]·[Zn(H2O)3(DMF)3]·3.1H2O (1) and Zn2(HBTC)(BTC)(H2O)3]·DMA·3H2O (2). Both compounds are thermally stable can be prepared reproducibly. Rehydration experiments on compound 2 demonstrate reversible dehydration rehydration while 1 rehydrates to different crystalline material. Network analysis revealed binodal (3,6)-net for...

The reaction of 1,3,5-benzenetricarboxylic acid (H3BTRI) with ZnSO4·7H2O in DMF and H2O afforded [Zn2(μ2-OH2)(HBTRI)(BTRI)(H2O)2]·DMA·3H2O (1). Compound 1 displays self-healing properties upon dehydration rehydration as revealed by scanning electron microscopy. Further studies showed that is flexible able to absorb additional water molecules high vapor pressure environments. H3BTRI Gd(NO3)3·6H2O resulted [Gd(BTRI)(H2O)6] (2). It also possible form compound 2 through a solid-state process...

The coordination polymer [Cd2(dipic)2(H2O)3]n was prepared by the reaction of cadmium(II) chloride or bromide and dipicolinic acid (dipicH2) at 60 °C under autogenous pressure. C2/c polymorph (1) almost exclusively obtained. However, a few crystals P2/c (2) were occasionally found in mixture with polymorph, thus making it disappearing concomitant polymorph. polymeric chains 1 are connected into dimers π–π interaction O–H···O hydrogen bonds. These turn intermolecular bonds 2D network. 2...

A mixed-ligand, partially fluorinated, 2-periodic metal–organic framework [Zn(hfipbb)(bpt)]n·n(DMF)2·n(H2O) (1) has been synthesized from the unique combination of a V-shaped dicarboxylic acid ligand, H2hfipbb = 4,4′-(hexafluoroisopropylidene)bis(benzoic acid) and bent pyridyl based colinker, bpt 4-amino-3,5-bis(4-pyridyl)-1,2,4-triazole. This undergoes single-crystal-to-single-crystal solvent exchange that leads to formation four additional structures [Zn(hfipbb)(bpt)]n·n(EtOH)2 (2),...

Monometallic and heterobimetallic complexes of Rh(I) bearing chelating N , O ‐bidentate aryl‐ ferrocenyl‐derived ligands have been synthesised via Schiff base condensation reactions, characterised fully using 1 H NMR, 13 C{ H} NMR Fourier transform infrared spectroscopies, elemental analysis mass spectrometry. The new monometallic were evaluated as potential catalyst precursors in the hydroformylation 1‐octene at 95°C 40 bar. ferrocenylimine mononuclear compounds inactive experiments....

Four two-dimensional (2D), fluorinated metal-organic frameworks (MOFs), [Cu(hfipbb)(DMF)]n·0.5(DMF)n (1), [Cu(hfipbb)(DEF)]n (2), [Cu3(hfipbb)3(DMA)3]n·6(DMA)n·2(H2O)n (3), and [Cu2(hfipbb)2(DEA)2]n·2(DEA)n·2(H2O)n (4), have been synthesized where hfipbb = 4,4'-(hexafluoroisopropylidene)bis(benzoate), DMF N,N'-dimethylformamide, DEF N,N'-diethylformamide, DMA N,N'-dimethylacetamide, DEA N,N'-diethylacetamide. The choice of either a formamide or acetamide solvent ligand leads to 2D, doubly...

From the parent compound [Ca[Co(ethylenediamine)(oxalato)2]2]n·4H2O, 1, a series of framework compounds was prepared via soluble sodium salt and crystal growth with divalent metal ions Cd2+, Mn2+, Sr2+, (2−4). These have same general formula [M[Co(ethylenediamine)(oxalato)2]2]n·xH2O, they all form four- eight-connected 3D net having scu topology (and are thus isoreticular) water filled channels variable size running in one direction crystals. However, crystallize two different space groups,...

A mixed-ligand MOF [Cd(bpe)1.5(nbdc)]n·nDMF0.84 (1) has been synthesized where bpe = 1,2-bis(4-pyridyl)ethane, nbdc 5-nitro-1,3-benzenedicarboxylate and DMF N,N′-dimethylformamide. Single crystal X-ray diffraction studies reveal that the structure consists of 2-periodic, 3D nets which exhibit a square lattice motif are catenated throughout structure. Variable-temperature single show desolvation upon heating is single-crystal-to-single-crystal (SCSC) process accompanied by change in...

A mixed-ligand 2D MOF based on ZnSO₄, trimesate and 4,4′-bipyridine-<italic>N</italic>,<italic>N</italic>′-dioxide shows reversible loss of uncoordinated coordinated water molecules.

A <italic>p</italic>-sulfonatocalix[4]arene-based, C-shaped supermolecule, [Ce₃(PDA)₄(C4AS)₂·13H₂O](NO₃)·25H₂O <bold>1</bold> was prepared and characterized by single crystal X-ray structural analysis, thermal methods (TG, DSC hot-stage microscopy) Hirshfeld analysis.

This amino acid derived (red&amp;blue) π-stacked (green) hydrogen bonded (striped) dimer forms a <bold>pcu</bold>-net with water molecules in the narrow channels. Four related are also presented and all were subjected to graph set Hirshfeld surface analyses.

We report the synthesis of two isoreticular mixed-ligand metal-organic frameworks (MOFs), namely, [Zn(μ2-ia)(μ2-bpe)] n· nDMF (1) and [Zn(μ2-mia)(μ2-bpe)] (2), where ia = isophthalate, mia 5-methoxyisophthalate, bpe 1,2-bis(4-pyridyl)ethane, DMF N, N'-dimethylformamide. Single-crystal X-ray diffraction studies revealed that structures 1 2 consist a 2-periodic, layer sql motif. Structures exhibit entanglement through interpenetration neighboring to form two-dimensional bilayer....

Two novel mixed 1D–2D coordination polymers based on 2D [Ln(4,4′-bpdo)₂(NO₃)₂(H₂O)₂]⁺_n sheets and 1D [Ln₂(4,4′-bpdo)₂(C4AS)(NO₃)(H₂O)₉]_n chains (Ln = Sm for <bold>1</bold> Ln Nd <bold>2</bold>) sustained by π⋯π interactions lattice water facilitated hydrogen bonds have been established.

The selectivity profile for the resolution of mandelic acid by quinine is dominated structures comprising (QUIN(+))(MAND(-)) salts with Z' = 3 which contain (R)-, (R)- and (S)-mandelate anions.

Dopamine (DA), a typical and representative catecholamine, is crucial for medical treatment clinical analysis because it an essential neurotransmitter.

We report the synthesis of two isoreticular, mixed-ligand metal–organic frameworks (MOFs), [Cd(μ2-mia)(μ2-bpe)]n·n(DMF)0.5·n(H2O)0.5 (1) and [Cd(μ2-nia)(μ2-bpee)]n·nDMF (2), where mia = 5-methoxyisophthalate, nia 5-nitroisophthalate, bpe 1,2-bis(4-pyridyl)ethane, bpee 1,2-bis(4-pyridyl)ethylene, DMF N,N′-dimethylformamide. Variable-temperature powder X-ray diffraction studies confirmed that both MOFs remain crystalline with activation at high temperatures. single-crystal were performed on 1,...

We herein report the synthesis and structure of a two dimensional (2D) metal-organic coordination polymer (or network) which extends in dimensions via Co 2+ 1,3,5-benzenetricarboxylate ions. The hydrothermal reaction (2R,2′R,2″R)-2,2′,2″-(benzenetricarbonyltris(azanediyl))tripropanoic acid (parent ligand) with cobalt nitrate presence pyridine lead to decomposition parent ligand producing 1,3,5-benzenetricarboxylate, turn reacted ions afford 2D network [Co 1.5 (BTC 3– )·(pyridine) 3 ·(H 2...