Abstract
Alternate TiO2 gel ultrathin films assembled with a macrocyclic carboxylic acids of tetrakis-4-carboxyphenyl porphine (TCPP) or tetra-4-carboxylphthalocyanine cobalt (II) (Co-TCPc) were prepared by the surface sol-gel process. To confirm the film growth and imprinting effect, quartz crystal microbalance (QCM) and UV-vis spectroscopy measurements were employed. The binding of TCPP was 1.2-14.3 times more selective compared to structurally related macrocyclic guest molecules. Among other findings, tetrakis-4-carboxymethyloxyphenyl porphine (TCMOPP) that has a spacer (OCH2) between the phenyl rings and carboxylic acid moieties of TCPP showed a significantly lower binding efficiency equal to 0.07, regardless of its similar molecular structure to the template molecule. Structural difference of porphyrin and phthalocyanine analogs could be also selectively discriminated: the TCPP imprinted film showed ca. 13 times higher selectivity for recognition of TCPP itself from the mixture of TCPP and Co-TCPc. Characterization by AFM demonstrated that the TiO2/TCPP film has highly uniform surface and ultrathin thickness, while both TEM and SEM studies confirmed the immobilized structures of TCPP inside the film.
| Original language | English |
|---|---|
| Pages (from-to) | 72-81 |
| Number of pages | 10 |
| Journal | Analytica Chimica Acta |
| Volume | 779 |
| DOIs | |
| Publication status | Published - May 24 2013 |
| Externally published | Yes |
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All Science Journal Classification (ASJC) codes
- Analytical Chemistry
- Biochemistry
- Environmental Chemistry
- Spectroscopy
Cite this
Self-assembly and imprinting of macrocyclic molecules in layer-by-layered TiO2 ultrathin films. / Araki, Kazuma; Yang, Do Hyeon; Wang, Tao; Selyanchyn, Roman; Lee, Seung Woo; Kunitake, Toyoki.
In: Analytica Chimica Acta, Vol. 779, 24.05.2013, p. 72-81.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Self-assembly and imprinting of macrocyclic molecules in layer-by-layered TiO2 ultrathin films
AU - Araki, Kazuma
AU - Yang, Do Hyeon
AU - Wang, Tao
AU - Selyanchyn, Roman
AU - Lee, Seung Woo
AU - Kunitake, Toyoki
PY - 2013/5/24
Y1 - 2013/5/24
N2 - Alternate TiO2 gel ultrathin films assembled with a macrocyclic carboxylic acids of tetrakis-4-carboxyphenyl porphine (TCPP) or tetra-4-carboxylphthalocyanine cobalt (II) (Co-TCPc) were prepared by the surface sol-gel process. To confirm the film growth and imprinting effect, quartz crystal microbalance (QCM) and UV-vis spectroscopy measurements were employed. The binding of TCPP was 1.2-14.3 times more selective compared to structurally related macrocyclic guest molecules. Among other findings, tetrakis-4-carboxymethyloxyphenyl porphine (TCMOPP) that has a spacer (OCH2) between the phenyl rings and carboxylic acid moieties of TCPP showed a significantly lower binding efficiency equal to 0.07, regardless of its similar molecular structure to the template molecule. Structural difference of porphyrin and phthalocyanine analogs could be also selectively discriminated: the TCPP imprinted film showed ca. 13 times higher selectivity for recognition of TCPP itself from the mixture of TCPP and Co-TCPc. Characterization by AFM demonstrated that the TiO2/TCPP film has highly uniform surface and ultrathin thickness, while both TEM and SEM studies confirmed the immobilized structures of TCPP inside the film.
AB - Alternate TiO2 gel ultrathin films assembled with a macrocyclic carboxylic acids of tetrakis-4-carboxyphenyl porphine (TCPP) or tetra-4-carboxylphthalocyanine cobalt (II) (Co-TCPc) were prepared by the surface sol-gel process. To confirm the film growth and imprinting effect, quartz crystal microbalance (QCM) and UV-vis spectroscopy measurements were employed. The binding of TCPP was 1.2-14.3 times more selective compared to structurally related macrocyclic guest molecules. Among other findings, tetrakis-4-carboxymethyloxyphenyl porphine (TCMOPP) that has a spacer (OCH2) between the phenyl rings and carboxylic acid moieties of TCPP showed a significantly lower binding efficiency equal to 0.07, regardless of its similar molecular structure to the template molecule. Structural difference of porphyrin and phthalocyanine analogs could be also selectively discriminated: the TCPP imprinted film showed ca. 13 times higher selectivity for recognition of TCPP itself from the mixture of TCPP and Co-TCPc. Characterization by AFM demonstrated that the TiO2/TCPP film has highly uniform surface and ultrathin thickness, while both TEM and SEM studies confirmed the immobilized structures of TCPP inside the film.
UR - http://www.scopus.com/inward/record.url?scp=84877628693&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84877628693&partnerID=8YFLogxK
U2 - 10.1016/j.aca.2013.04.009
DO - 10.1016/j.aca.2013.04.009
M3 - Article
C2 - 23663674
AN - SCOPUS:84877628693
VL - 779
SP - 72
EP - 81
JO - Analytica Chimica Acta
JF - Analytica Chimica Acta
SN - 0003-2670
ER -