Ternary copper(II) complexes with N-carboxymethyl-l-prolinato(2−) ion and imidazole or creatinine: A comparative study of the interligand interactions influencing the molecular recognition and stability

Tribet, M.; Covelo, Berta; Sicilia-Zafra, A.G; Navarrete-Casas, Ricardo; Choquesillo-Lazarte, Duane; González‐Pérez, Josefa María; Castiñeiras, Alfonso; Niclós‐Gutiérrez, Juan

doi:10.1016/j.jinorgbio.2005.03.012

Cited by 9 publications

(3 citation statements)

References 38 publications

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“…CMP was synthesized according to the literature with some modifications. 16 Twenty millimoles of chloroacetic acid was cooled to −18 °C and stirred under argon atmosphere. To this was added dropwise 2.5 g of potassium hydroxide dissolved in 10 mL of water.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

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Investigations on the Maillard Reaction of Dextrins during Aging of Pilsner Type Beer

Rakete

Klaus

Glomb

2014

J. Agric. Food Chem.

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Although Maillard reaction plays a pivotal role during preparation of food, only few investigations concerning the role of carbohydrate degradation in beer aging have been carried out. The formation of Maillard specific precursor structures and their follow-up products during degradation of low molecular carbohydrate dextrins in the presence of proline and lysine was studied in model incubations and in beer. Twenty-one α-dicarbonyl compounds were identified and quantitated as reactive intermediates. The oxidative formation of 3-deoxypentosone as the precursor of furfural from oligosaccharides was verified. N-Carboxymethylproline and N-formylproline were established as novel proline derived Maillard advanced glycation end products. Formation of N-carboxymethylproline and furfural responded considerably to the presence of oxygen and was positively correlated to aging of Pilsner type beer. The present study delivers an in-depth view on the mechanisms behind the formation of beer relevant aging parameters.

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Section: ■ Materials and Methodsmentioning

confidence: 99%

“…CMP was synthesized according to the literature with some modifications . Twenty millimoles of chloroacetic acid was cooled to −18 °C and stirred under argon atmosphere.…”

Section: Materials and Methodsmentioning

confidence: 99%

Investigations on the Maillard Reaction of Dextrins during Aging of Pilsner Type Beer

Rakete

Klaus

Glomb

2014

J. Agric. Food Chem.

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“…The [Ni(H 2 O) 6 ] 2+ possesses stable and rigid octahedral geometry which allows mainly hydrogen bonds (HB) to the host framework of CMP-3a; however, viable HBs are scarce due to the weak interaction nature of HBs. Physicochemical adsorption of hydrated Ni(II) ions may take place mostly in the lp of CMP-3a (Scheme 2a); (ii) in comparison with the Ni(II), the Cu(II) can vary the coordination sphere among dominant square planar [Cu-(H 2 O) 4 ] 2+ and possible square pyramid [Cu(H 2 O) 5 ] 2+ (4 + 1) and distorted octahedral [Cu(H 2 O) 6 ] 2+ (4 + 2) in confined spaces, 44,45 due to the Jahn−Teller effect (JTE) on Cu(II) centers. The presence of coordination unsaturated hydrated Cu 2+ ions increases the coordination interactions between Cu(II) ions and the pyridyl groups in the np of CMP-3a.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Highly Efficient and Selective Removal of Lead Ions from Aqueous Solutions by Conjugated Microporous Polymers with Functionalized Heterogeneous Pores

Qiao

Liu

Wang

et al. 2019

Crystal Growth & Design

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The development of viable absorbents for highly efficient and selective removal of lead (Pb) ions, which might exist in various waste discharges related to human activities, is considered a long-standing challenge. Current scientific interests reside in achieving material absorbents with high porosity and desired functionality that respectively relate to generally higher Pb(II) uptake and selectivity. In this work, two-dimensional conjugated microporous polymers (CMP-2 and CMP-3) were rationally designed in which the heterogeneous (large and narrow) pores of these materials were chemically functionalized with cyano and pyridyl groups, respectively. As expected, the activated CMP-2a and CMP-3a displayed a high Pb(II) adsorption capacity of 62.7 and 93.2 mg g–1, respectively. Of note is that the CMP-3a could selectively uptake Pb(II) (84%) over Cu(II) (40%) and Ni(II) (18.6%) in simulated wastewater. It was demonstrated that the formation of functionalized and heterogeneous pore structures in CMP-3a accounted for its highly efficient and selective adsorption property toward Pb2+. In addition, CMP-2a and CMP-3a could be easily recovered and regenerated for Pb2+ removal from aqueous solutions and exhibited nondetectable cytotoxicity, which were favorable for their applications as viable and safe absorbents for Pb(II) removal in aqueous phases.

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Metal Chelates of N‐(2‐pyridylmethyl)iminodiacetate(2‐) Ion (pmda). Part II. Ternary pmda Chelates with M = Co, Cu or Zn and Creatinine as Auxiliary Ligand

Castiñeiras

Choquesillo‐Lazarte

González‐Pérez

et al. 2006

Zeitschrift anorg allge chemie

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The compounds [Cu(pmda)(crea)]·H2O (1), [Zn(pmda)(crea)]·H2O (2) and [Co(pmda)(crea)(H2O)]·H2O (3) were prepared and characterized by thermal, spectral and X‐ray diffraction methods. In compounds 1 and 2 the MII coordination is of type 4+1 and approaches to a trigonal bipyramid (71.85 and 86.18 %, respectively) with rather linear N(pmda)‐MII‐N(crea) trans‐apical angles, but with different longest coordination bond (Cu‐O(pmda) or Zn‐N(apliphatic, pmda), respectively). Both compounds are isotypic and one intra‐molecular interligand N‐H···O interaction reinforces the molecular recogniton crea‐MII(pmda) chelate. In contrast, the compound 3 exhibits an octahedral coordination, imposed by the 3d7 electronic configuration of the cobalt(II) atom, and the crea‐chelate recognition involves the Co‐N(crea) coordination bond and one intramolecular ‘bifurcated’ H‐bonding interaction between one N‐H(crea) bond and one O(pmda) plus the O(aqua) atoms as ‘acceptors’.

show abstract

Ternary copper(II) complexes with N-carboxymethyl-l-prolinato(2−) ion and imidazole or creatinine: A comparative study of the interligand interactions influencing the molecular recognition and stability

Cited by 9 publications

References 38 publications

Investigations on the Maillard Reaction of Dextrins during Aging of Pilsner Type Beer

Investigations on the Maillard Reaction of Dextrins during Aging of Pilsner Type Beer

Highly Efficient and Selective Removal of Lead Ions from Aqueous Solutions by Conjugated Microporous Polymers with Functionalized Heterogeneous Pores

Metal Chelates of N‐(2‐pyridylmethyl)iminodiacetate(2‐) Ion (pmda). Part II. Ternary pmda Chelates with M = Co, Cu or Zn and Creatinine as Auxiliary Ligand

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