pH-triggered changes in the supramolecular self-assembly of Cu(II) malonate complexes

Somnath Ray Choudhury; Atish Dipankar Jana; Chih Yuan Chen; Amitava Dutta; Enrique Colacio; Hon Man Lee; Golam Mostafa; Subrata Mukhopadhyay

doi:10.1039/b802723d

pH-triggered changes in the supramolecular self-assembly of Cu(II) malonate complexes

Somnath Ray Choudhury, Atish Dipankar Jana, Chih Yuan Chen, Amitava Dutta, Enrique Colacio, Hon Man Lee, Golam Mostafa, Subrata Mukhopadhyay

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

26 Citations (Scopus)

Abstract

Two different hydrate phases, namely, {[Cu(mal)₂](picH) ₂·2H₂O}_n (1) and {[Cu(mal) ₂](picH)₂·5H₂O}_n (2) [malH₂ = malonic acid; picH = protonated 2-amino-4-picoline] could be synthesized from purely aqueous media simply by mixing the reactants in stoichiometric ratio but with a slight alteration in the acidity of the reaction media. When the solid-state structure of 1 is compared with the previously reported complex 2, interesting changes in the supramolecular self-assembly are noticed. We found that the observed pH-triggered change is exclusive in the ternary system stated and not for Ni(II), Co(II) or Mn(II). We also noticed the presence of a -CH₃⋯Ow interaction between the methyl terminals of protonated picoline molecules and the oxygen atoms of lattice water molecules in 1.

Original language	English
Pages (from-to)	1358-1363
Number of pages	6
Journal	CrystEngComm
Volume	10
Issue number	10
DOIs	https://doi.org/10.1039/b802723d
Publication status	Published - 2008 Oct 1

All Science Journal Classification (ASJC) codes

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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title = "pH-triggered changes in the supramolecular self-assembly of Cu(II) malonate complexes",

abstract = "Two different hydrate phases, namely, {[Cu(mal)2](picH) 2·2H2O}n (1) and {[Cu(mal) 2](picH)2·5H2O}n (2) [malH2 = malonic acid; picH = protonated 2-amino-4-picoline] could be synthesized from purely aqueous media simply by mixing the reactants in stoichiometric ratio but with a slight alteration in the acidity of the reaction media. When the solid-state structure of 1 is compared with the previously reported complex 2, interesting changes in the supramolecular self-assembly are noticed. We found that the observed pH-triggered change is exclusive in the ternary system stated and not for Ni(II), Co(II) or Mn(II). We also noticed the presence of a -CH3⋯Ow interaction between the methyl terminals of protonated picoline molecules and the oxygen atoms of lattice water molecules in 1.",

author = "Choudhury, {Somnath Ray} and Jana, {Atish Dipankar} and Chen, {Chih Yuan} and Amitava Dutta and Enrique Colacio and Lee, {Hon Man} and Golam Mostafa and Subrata Mukhopadhyay",

year = "2008",

month = oct,

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doi = "10.1039/b802723d",

language = "English",

volume = "10",

pages = "1358--1363",

journal = "CrystEngComm",

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T1 - pH-triggered changes in the supramolecular self-assembly of Cu(II) malonate complexes

AU - Choudhury, Somnath Ray

AU - Jana, Atish Dipankar

AU - Chen, Chih Yuan

AU - Dutta, Amitava

AU - Colacio, Enrique

AU - Lee, Hon Man

AU - Mostafa, Golam

AU - Mukhopadhyay, Subrata

PY - 2008/10/1

Y1 - 2008/10/1

N2 - Two different hydrate phases, namely, {[Cu(mal)2](picH) 2·2H2O}n (1) and {[Cu(mal) 2](picH)2·5H2O}n (2) [malH2 = malonic acid; picH = protonated 2-amino-4-picoline] could be synthesized from purely aqueous media simply by mixing the reactants in stoichiometric ratio but with a slight alteration in the acidity of the reaction media. When the solid-state structure of 1 is compared with the previously reported complex 2, interesting changes in the supramolecular self-assembly are noticed. We found that the observed pH-triggered change is exclusive in the ternary system stated and not for Ni(II), Co(II) or Mn(II). We also noticed the presence of a -CH3⋯Ow interaction between the methyl terminals of protonated picoline molecules and the oxygen atoms of lattice water molecules in 1.

AB - Two different hydrate phases, namely, {[Cu(mal)2](picH) 2·2H2O}n (1) and {[Cu(mal) 2](picH)2·5H2O}n (2) [malH2 = malonic acid; picH = protonated 2-amino-4-picoline] could be synthesized from purely aqueous media simply by mixing the reactants in stoichiometric ratio but with a slight alteration in the acidity of the reaction media. When the solid-state structure of 1 is compared with the previously reported complex 2, interesting changes in the supramolecular self-assembly are noticed. We found that the observed pH-triggered change is exclusive in the ternary system stated and not for Ni(II), Co(II) or Mn(II). We also noticed the presence of a -CH3⋯Ow interaction between the methyl terminals of protonated picoline molecules and the oxygen atoms of lattice water molecules in 1.

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