Abstract
Recently, a new catalyst that mimics carbonic anhydrase (CA) was constructed by the self-assembly of histidyl bolaamphiphilic molecules and a Zn ion cofactor. The catalytic Zn ion complex in a tetrahedral coordination geometry is composed of self-organized histidyl imidazoles and a single hydroxide ion. However, the Zn-hydroxide coordination, the key structure of the catalytic analogue, is disturbed by the pairing anion of the Zn salt. Here, the performances of the CA-mimicking catalysts prepared from various Zn salts were examined along with CO2 hydration. Among the Zn salts with different anions, Zn(OH)2 showed the highest catalytic performance with increased CO2 hydrolysis activity. Spectroscopic and thermodynamic analyses proved the formation of histidine-Zn-hydroxide coordination with a lowered activation energy if Zn(OH)2 was used. With regard to the anion interaction with the Zn ion, the catalytic performance is inversely proportional to the solution dissociation energy of the Zn salt. Zinc about it: Among the various Zn salts used for the preparation of a catalyst that mimics carbonic anhydrase (CA), Zn(OH)2 shows the highest catalytic performance with increased hydrolysis activity as it minimizes the interference of the counter anion. Spectroscopic analysis and calculated activation energies along with practical CO2 sequestration of the CA-mimetic catalysts confirms catalysis inhibition by Zn-binding anions.
| Original language | English |
|---|---|
| Pages (from-to) | 698-704 |
| Number of pages | 7 |
| Journal | ChemCatChem |
| Volume | 7 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2015 Jan 1 |
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All Science Journal Classification (ASJC) codes
- Catalysis
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry
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Comparative study on the catalytic hydration of carbon dioxide by catalysts that mimic carbonic anhydrase prepared with zinc salts. / Kim, Min Chul; Lee, Sang Yup.
In: ChemCatChem, Vol. 7, No. 4, 01.01.2015, p. 698-704.Research output: Contribution to journal › Article
TY - JOUR
T1 - Comparative study on the catalytic hydration of carbon dioxide by catalysts that mimic carbonic anhydrase prepared with zinc salts
AU - Kim, Min Chul
AU - Lee, Sang Yup
PY - 2015/1/1
Y1 - 2015/1/1
N2 - Recently, a new catalyst that mimics carbonic anhydrase (CA) was constructed by the self-assembly of histidyl bolaamphiphilic molecules and a Zn ion cofactor. The catalytic Zn ion complex in a tetrahedral coordination geometry is composed of self-organized histidyl imidazoles and a single hydroxide ion. However, the Zn-hydroxide coordination, the key structure of the catalytic analogue, is disturbed by the pairing anion of the Zn salt. Here, the performances of the CA-mimicking catalysts prepared from various Zn salts were examined along with CO2 hydration. Among the Zn salts with different anions, Zn(OH)2 showed the highest catalytic performance with increased CO2 hydrolysis activity. Spectroscopic and thermodynamic analyses proved the formation of histidine-Zn-hydroxide coordination with a lowered activation energy if Zn(OH)2 was used. With regard to the anion interaction with the Zn ion, the catalytic performance is inversely proportional to the solution dissociation energy of the Zn salt. Zinc about it: Among the various Zn salts used for the preparation of a catalyst that mimics carbonic anhydrase (CA), Zn(OH)2 shows the highest catalytic performance with increased hydrolysis activity as it minimizes the interference of the counter anion. Spectroscopic analysis and calculated activation energies along with practical CO2 sequestration of the CA-mimetic catalysts confirms catalysis inhibition by Zn-binding anions.
AB - Recently, a new catalyst that mimics carbonic anhydrase (CA) was constructed by the self-assembly of histidyl bolaamphiphilic molecules and a Zn ion cofactor. The catalytic Zn ion complex in a tetrahedral coordination geometry is composed of self-organized histidyl imidazoles and a single hydroxide ion. However, the Zn-hydroxide coordination, the key structure of the catalytic analogue, is disturbed by the pairing anion of the Zn salt. Here, the performances of the CA-mimicking catalysts prepared from various Zn salts were examined along with CO2 hydration. Among the Zn salts with different anions, Zn(OH)2 showed the highest catalytic performance with increased CO2 hydrolysis activity. Spectroscopic and thermodynamic analyses proved the formation of histidine-Zn-hydroxide coordination with a lowered activation energy if Zn(OH)2 was used. With regard to the anion interaction with the Zn ion, the catalytic performance is inversely proportional to the solution dissociation energy of the Zn salt. Zinc about it: Among the various Zn salts used for the preparation of a catalyst that mimics carbonic anhydrase (CA), Zn(OH)2 shows the highest catalytic performance with increased hydrolysis activity as it minimizes the interference of the counter anion. Spectroscopic analysis and calculated activation energies along with practical CO2 sequestration of the CA-mimetic catalysts confirms catalysis inhibition by Zn-binding anions.
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U2 - 10.1002/cctc.201402830
DO - 10.1002/cctc.201402830
M3 - Article
VL - 7
SP - 698
EP - 704
JO - ChemCatChem
JF - ChemCatChem
SN - 1867-3880
IS - 4
ER -