On the Nature of Sandwiched Chromium Complexes in Exchanged alpha-Zirconium Phosphate

Rapôso, Claudia Maria de Oliveira; Eon, Jean‐Guillaume

doi:10.1590/s1516-14392002000400005

Cited by 5 publications

(5 citation statements)

References 28 publications

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“…Numerous studies describing the intercalation of ions, , small molecules, − metal complexes, and organic cations , in the galleries of α-ZrP have been reported. These early studies provided a strong basis for the intercalation of enzymes in the galleries of α-ZrP to test the above hypothesis of entropy control of enzyme stability by constraining enzymes between nanoplates.…”

Section: Layered Inorganic Solid α-Zrpmentioning

confidence: 99%

Nanobio Interfaces: Charge Control of Enzyme/Inorganic Interfaces for Advanced Biocatalysis

Deshapriya¹,

Kumar²

2013

Langmuir

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Specific approaches to the rational design of nanobio interfaces for enzyme and protein binding to nanomaterials are vital for engineering advanced, functional nanobiomaterials for biocatalysis, sensing, and biomedical applications. This feature article presents an overview of our recent discoveries on structural, functional, and mechanistic details of how enzymes interact with inorganic nanomaterials and how they can be controlled in a systematic manner using α-Zr(IV)phosphate (α-ZrP) as a model system. The interactions of a number of enzymes having a wide array of surface charges, sizes, and functional groups are investigated. Interactions are carefully controlled to screen unfavorable repulsions and enhance favorable interactions for high affinity, structure retention, and activity preservation. In specific cases, catalytic activities and substrate selectivities are improved over those of the pristine enzymes, and two examples of high activity near the boiling point of water have been demonstrated. Isothermal titration calorimetric studies indicated that enzyme binding is coupled to ion sequestration or release to or from the nanobio interface, and binding is controlled in a rational manner. We learned that (1) bound enzyme stabilities are improved by lowering the entropy of the denatured state; (2) maximal loadings are obtained by matching charge footprints of the enzyme and the nanomaterial surface; (3) binding affinities are improved by ion sequestration at the nanobio interface; and (4) maximal enzyme structure retention is obtained by biophilizing the nanobio interface with protein glues. The chemical and physical manipulations of the nanobio interface are significant not only for understanding the complex behaviors of enzymes at biological interfaces but also for desiging better functional nanobiomaterials for a wide variety of practical applications.

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Section: Layered Inorganic Solid α-Zrpmentioning

confidence: 99%

Nanobio Interfaces: Charge Control of Enzyme/Inorganic Interfaces for Advanced Biocatalysis

Deshapriya¹,

Kumar²

2013

Langmuir

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“…5b), some of the characteristic vibration bands of the CTAB (2920, 2850, 1480, 1290, 910, and 715 cm À1 ) are presented. Besides several broad bands centered at 3500 cm À1 (n(OH or H 3 O + ) 34,41-44 and/or n(P-OH) 41 ), those at 1630 cm À1 (d as (OH or H 3 O + ), 23,41,43 1070 cm À1 (n s (PO 4 )), 1,10,23,41-44 and 505 cm À1 (d out (POH) 40 and/or d(PO 4 ) 23,41,43 ) are also detected. Compared with Fig.…”

Section: Synthesis Of Chromium Phosphatesmentioning

confidence: 99%

“…Depending on the substrate and/or coordination environment in which Cr(III) ions are located, red-or blue-shifts can occur for the above bands, and only some of the above bands could be detected in the chromium-containing compounds. 6,41,[49][50][51][52][53][54][55][56][57][58][59][60] In Fig. 8, all the above five bands at 290, 445, 640, 665, and 688 nm have been detected, and they can be ascribed to the d-d electron transitions from 4 A 2g (F) to T 1g (P), 4 T 1g (F), 4 T 2g (F), 2 E 2g (G), and 2 T 1g (G), respectively.…”

Section: Synthesis Of Chromium Phosphatesmentioning

confidence: 99%

Synthesis of mesoporous chromium phosphatesvia solid-state reaction at low temperature

Liu

Chao

et al. 2012

New J. Chem.

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“…Thus the calculated vibration frequencies of a-ZrP lattice are close to experimental values. 15 The figure shows broad peaks located within the range between 200 cm -1 and 600 cm -1 in both systems I and II; and also number of apparent peaks are located between 1050 cm -1 and 1250 cm -1 in system I, and between 1080 cm -1 and 1380 cm -1 in system II.…”

Section: Resultsmentioning

confidence: 88%

Computer Simulation of n‐Butylamine‐Intercalated α‐Zirconium Phosphate

Chen¹,

Zhong²,

et al. 2010

J Chinese Chemical Soc

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Molecular dynamics simulation was carried out to study the structure properties of α‐Zirconium Phosphate (α‐ZrP) loaded with n‐butylamine molecules. Two minimum‐energy configurations of α‐ZrP with interlayer distances 12.7 and 17.0 Å were found from the simulation. The structure properties of n‐butylmine, α‐ZrP and also interaction between n‐butylamine and α‐ZrP were analyzed. The different phase behavior was found due to the different strength of interaction between NH2 in n‐butylamine and O in PO4 of α‐ZrP.

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On the Nature of Sandwiched Chromium Complexes in Exchanged alpha-Zirconium Phosphate

Cited by 5 publications

References 28 publications

Nanobio Interfaces: Charge Control of Enzyme/Inorganic Interfaces for Advanced Biocatalysis

Nanobio Interfaces: Charge Control of Enzyme/Inorganic Interfaces for Advanced Biocatalysis

Synthesis of mesoporous chromium phosphatesvia solid-state reaction at low temperature

Computer Simulation of n‐Butylamine‐Intercalated α‐Zirconium Phosphate

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