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Showing 1 to 12 of 3665 entries
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Exceptionally low shear modulus in a prototypical imidazole-based metal-organic framework.

Physical review letters

Tan JC, Civalleri B, Lin CC, Valenzano L, Galvelis R, Chen PF, Bennett TD, Mellot-Draznieks C, Zicovich-Wilson CM, Cheetham AK.
PMID: 22463647
Phys Rev Lett. 2012 Mar 02;108(9):095502. doi: 10.1103/PhysRevLett.108.095502. Epub 2012 Feb 29.

Using Brillouin scattering, we measured the single-crystal elastic constants (C(ij)'s) of a prototypical metal-organic framework (MOF): zeolitic imidazolate framework (ZIF)-8 [Zn(2-methylimidazolate)(2)], which adopts a zeolitic sodalite topology and exhibits large porosity. Its C(ij)'s under ambient conditions are (in GPa)...

Peroxido complexes of vanadium(V) as ligands. Crystal structures of [Cd(NH3)6][{VO(O2)2(OH)}2{μ-Cd(NH3)4}] and [{VO(O2)2(Im)}2{μ-Cu(Im)4}] (Im = Imidazole).

Inorganic chemistry

Bystrický R, Antal P, Tatiersky J, Schwendt P, Gyepes R, Žák Z.
PMID: 24801123
Inorg Chem. 2014 May 19;53(10):5037-43. doi: 10.1021/ic500066p. Epub 2014 May 06.

Two novel heterometallic complexes [Cd(NH3)6][{VO(O2)2(OH)}2{μ-Cd(NH3)4}] (2) and [{VO(O2)2(Im)}2{μ-Cu(Im)4}] (3) (Im = imidazole) containing peroxidovanadium complexes as metalloligands were prepared and characterized by spectral methods. X-ray single-crystal analysis revealed the presence of unique trinuclear complexes in the crystal structures of...

Nickel-Mediated Asymmetric Allylic Alkylation between Nitroallylic Acetates and Acyl Imidazoles.

Organic letters

Wang J, Wang P, Wang L, Li D, Wang K, Wang Y, Zhu H, Yang D, Wang R.
PMID: 28862455
Org Lett. 2017 Sep 15;19(18):4826-4829. doi: 10.1021/acs.orglett.7b02264. Epub 2017 Sep 01.

A nickel-mediated asymmetric allylic alkylation reaction between imidazole-modified ketones and nitroallylic acetates is presented. This reaction is catalyzed by a simple chiral diamine-nickel catalyst under mild conditions and leads to a series of novel enantioenriched α-allylic adducts in moderate...

Synthesis of Fused Imidazole-Containing Ring Systems via Dual Oxidative Amination of C(sp(3))-H Bonds.

The Journal of organic chemistry

Castanedo G, Liu Y, Crawford JJ, Braun MG.
PMID: 27529722
J Org Chem. 2016 Sep 16;81(18):8617-24. doi: 10.1021/acs.joc.6b01517. Epub 2016 Aug 29.

A general and efficient method for a metal-free one-pot synthesis of highly substituted fused imidazole-containing 5,5- and 5,6-fused bicyclic heterocycles is described. Starting from commercially available substrates and reagents, the reaction proceeds through two C-N bond formations and an...

Iron(II) Bis(imidazole) Derivatives of a Binuclear Porphyrin Model: Crystal Structures and Mössbauer Properties.

Inorganic chemistry

Yao Z, Schulz CE, Zhan N, Li J.
PMID: 28980807
Inorg Chem. 2017 Oct 16;56(20):12615-12624. doi: 10.1021/acs.inorgchem.7b02092. Epub 2017 Oct 05.

A new sterically hindered "picket fence-like" porphyrin with chelates for the second metal atom, H

Rh(II)-Catalyzed Transannulation of N-Sulfonyl-1,2,3-Triazoles with 2,1-Benzisoxazoles or 1,2-Benzisoxazoles.

Organic letters

Lei X, Gao M, Tang Y.
PMID: 27672715
Org Lett. 2016 Oct 07;18(19):4990-4993. doi: 10.1021/acs.orglett.6b02454. Epub 2016 Sep 27.

A Rh(II)-catalyzed transannulation of N-sulfonyl-1,2,3-triazoles with 2,1-benzisoxazoles has been developed, which affords an efficient method for the synthesis of quinazoline derivatives. The transformation represents an unprecedented example which utilizes N-sulfonyl-1,2,3-triazole as an aza-[2C]-component in cycloadditions. Meanwhile, a Rh(II)-catalyzed formal...

NIR emission and luminescent sensing of a lanthanide-organic framework with Lewis basic imidazole and pyridyl sites.

Dalton transactions (Cambridge, England : 2003)

Liu LH, Qiu XT, Wang YJ, Shi Q, Sun YQ, Chen YP.
PMID: 28858344
Dalton Trans. 2017 Sep 28;46(36):12106-12113. doi: 10.1039/c7dt02745a. Epub 2017 Aug 31.

A series of lanthanide-organic frameworks [Ln(Himdc)(ina)(H

Supramolecular structure fluctuations of an imidazolium-based protic ionic liquid.

The Journal of chemical physics

Zorębski E, Zorębski M, Dzida M, Lodowski P, Kowalska-Szojda K, Feder-Kubis J, Mirzaev SZ, Kaatze U.
PMID: 28390353
J Chem Phys. 2017 Apr 07;146(13):134505. doi: 10.1063/1.4979287.

At 20, 25, 30, and 40 °C, the ultrasonic absorption spectra of the protic ionic liquid 3-(butoxymethyl)-1H-imidazol-3-ium salicylate have been measured between 0.6 and 900 MHz. Below 250 MHz, the absorption coefficient decreases with temperature, potentially indicating a major...

Investigation of the terahertz vibrational modes of ZIF-8 and ZIF-90 with terahertz time-domain spectroscopy.

Chemical communications (Cambridge, England)

Tan NY, Ruggiero MT, Orellana-Tavra C, Tian T, Bond AD, Korter TM, Fairen-Jimenez D, Zeitler JA.
PMID: 26340410
Chem Commun (Camb). 2015 Nov 18;51(89):16037-40. doi: 10.1039/c5cc06455d.

We present experimental and computational evidence that gate-opening modes for zeolitic imidazole frameworks can be observed at terahertz frequencies. Our work highlights the critical importance to correctly optimise the crystal structure prior to computational lattice dynamics analysis. The results...

Screening for Methylated Poly(l-histidine) with Various Dimethylimidazolium/Methylimidazole/Imidazole Contents as DNA Carrier.

Pharmaceutics

Asayama S, Kumagai T, Kawakami H.
PMID: 26308045
Pharmaceutics. 2015 Aug 25;7(3):224-32. doi: 10.3390/pharmaceutics7030224.

: Methylated poly(l-histidine) (PLH-Me), our original polypeptide, has controlled the contents of dimethylimidazolium, τ/π-methylimidazole and imidazole groups for efficient gene delivery. The screening for the PLH-Me as DNA carrier has been carried out by use of the PLH with...

Postsynthetic ionization of an imidazole-containing metal-organic framework for the cycloaddition of carbon dioxide and epoxides.

Chemical science

Liang J, Chen RP, Wang XY, Liu TT, Wang XS, Huang YB, Cao R.
PMID: 28451286
Chem Sci. 2017 Feb 01;8(2):1570-1575. doi: 10.1039/c6sc04357g. Epub 2016 Nov 02.

A bifunctional imidazolium functionalized zirconium metal-organic framework (Zr-MOF), (I

Quinazolinone azolyl ethanols: potential lead antimicrobial agents with dual action modes targeting methicillin-resistant Staphylococcus aureus DNA.

Future medicinal chemistry

Peng XM, Peng LP, Li S, Avula SR, Kannekanti VK, Zhang SL, Tam KY, Zhou CH.
PMID: 27668522
Future Med Chem. 2016 Oct;8(16):1927-1940. doi: 10.4155/fmc-2016-0002. Epub 2016 Sep 26.

AIM: Due to bacterial drug resistance, a new series of quinazolinone azolyl ethanols were synthesized and evaluated.RESULTS: In vitro antibacterial assay showed that triazolyl ethanol quinazolinone 3a was the most active compound, especially against methicillin-resistant Staphylococcus aureus (MRSA) with...

Showing 1 to 12 of 3665 entries