A New Type of Supramolecular Assembly by Hydrogen Bond Templating: Identification of Rare Monodentate Acetate Coordination in [Fe3(µ3‐O)(µ2‐CH3COO)6(H2O)2(CH3COO)]·T·ClO4 (T = 2,6‐Diaminopyridinium Cation, C5H8N3 and 2‐Aminopyridinium Cation, C5H7N2)

Supriya, Sabbani; Latha, K. Swarna; Das, Samar K.

doi:10.1002/ejic.200400370

Cited by 8 publications

References 19 publications

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An Enolisable Barbiturate with Adjustable Hydrogen‐Bonding Structure for UV/Vis Detection of Nucleic Acid Bases and Related Compounds

Bolz

Spange

2008

Chemistry A European J

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The use of hydrogen-bonding patterns in the same way as is known from DNA building blocks is a challenge for the construction of novel types of suitable chromophoric probes. This feature has been utilised for the construction of a novel type of UV/Vis probe for detection of supramolecular AAD or DAD sequences (A=hydrogen bond acceptor, D=hydrogen bond donor). Here we report on the structure of the enolisable chromophore 1-n-butyl-5-(4-nitrophenyl)barbituric acid (1), which has an adjustable hydrogen-bonding pattern. The position of the keto-enol equilibrium of this dye is strongly influenced both by the solvent polarity and by the chemical environment. Furthermore, the recognition properties of the barbiturate were examined by the use of seven artificial receptors: the pyridine bases 2,6-diaminopyridine (DAP), 2,6-diacetamidopyridine (DAC) and 2,6-bis(trifluoroacetamido)pyridine (TFA), as well as the nucleic acid bases 9-ethyladenine (EtAd), 9-ethylguanine (EtGu), 1-n-butylcytosine (BuCy) and 1-n-butylthymine (BuTy). It was found that 1 can interact with these bases either through acid-base interaction or by hydrogen-bonding complexation. The balance between the interactions is dependent both on the basicity strength and on the presence of a suitable recognition sequence in the base. The induced formation of the enol form of 1 thus causes a significant UV/Vis shift as function of the nature of the base.

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An Enolisable Barbiturate with Adjustable Hydrogen‐Bonding Structure for UV/Vis Detection of Nucleic Acid Bases and Related Compounds

Bolz

Spange

2008

Chemistry A European J

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Mössbauer spectra of two extended series of basic iron(III) carboxylates [Fe3O(O2CR)6(H2O)6]A (A− = ClO4 −, NO3 −)

et al. 2010

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Two series of basic iron(III) carboxylates [Fe 3 O(O 2 CR) 6 (H 2 O) 3 ]A were prepared, with R = CCl 3 , CHBr 2 , CH 2 F, CH 2 Cl, C(OH)Ph 2 , H, Ph, (CH 2 ) 3 Cl, Me, CHMe 2 , Et, CMe 3 . For the former series (1-12) A − = ClO − 4 and for the latter (13-24) A − = NO − 3 . Complexes with R = CF 3 were inaccessible for either counteranion, with all synthetic attempts leading to the butterfly complex [ structures of 1, 2, 5, 7, 9-12, 14, 16, 21 and 23 revealed the close structural similarity of the complexes. Mössbauer studies revealed very similar isomer shifts for all complexes in the region of 0.51-0.54 mm s −1 , and variable quadrupole splittings, ranging from 0.36 to 0.76 mm s −1 . Mössbauer studies of the complexes were carried out in frozen MeCN solutions in order to assess their stability in solution. All complexes proved to be stable in MeCN solutions, except complex 13 (R = CCl 3 , A − = NO − 3 ), which dissociated to a butterfly-type complex.

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A Triazolate-Supported Fe3(μ 3 -O) Core: Crystal Structure, Fluorescence, and Hirshfeld Surface Analysis

et al. 2016

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A New Type of Supramolecular Assembly by Hydrogen Bond Templating: Identification of Rare Monodentate Acetate Coordination in [Fe₃(µ₃‐O)(µ₂‐CH₃COO)₆(H₂O)₂(CH₃COO)]·T·ClO₄ (T = 2,6‐Diaminopyridinium Cation, C₅H₈N₃ and 2‐Aminopyridinium Cation, C₅H₇N₂)

Cited by 8 publications

References 19 publications

An Enolisable Barbiturate with Adjustable Hydrogen‐Bonding Structure for UV/Vis Detection of Nucleic Acid Bases and Related Compounds

An Enolisable Barbiturate with Adjustable Hydrogen‐Bonding Structure for UV/Vis Detection of Nucleic Acid Bases and Related Compounds

Mössbauer spectra of two extended series of basic iron(III) carboxylates [Fe3O(O2CR)6(H2O)6]A (A− = ClO4 −, NO3 −)

A Triazolate-Supported Fe3(μ 3 -O) Core: Crystal Structure, Fluorescence, and Hirshfeld Surface Analysis

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