Kinetic modelling of the photochromism and metal complexation of a spiropyran dye: Application to the Co(II) – Spiroindoline-diphenyloxazolebenzopyran system
A spirobenzopyran containing 6-chloro and 8-diphenyloxazole substituents has been investigated in acetonitrile solution by nanosecond laser photolysis at room temperature. In degassed solution, a short-lived transient (5 μs) has been identified as the triplet state of the closed spiro form. The rati...
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| Veröffentlicht in: | Dyes and pigments 2011-06, Vol.89 (3), p.324-329 |
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| creator | Zakharova, M.I. Coudret, C. Pimienta, V. Micheau, J.C. Sliwa, M. Poizat, O. Buntinx, G. Delbaere, S. Vermeersch, G. Metelitsa, A.V. Voloshin, N. Minkin, V.I. |
| description | A spirobenzopyran containing 6-chloro and 8-diphenyloxazole substituents has been investigated in acetonitrile solution by nanosecond laser photolysis at room temperature. In degassed solution, a short-lived transient (5 μs) has been identified as the triplet state of the closed spiro form. The ratio between the singlet and triplet pathways of ring opening has been determined from oxygen quenching measurements. In the presence of Co(II), UV irradiation is needed to induce the complexation. The fast second order rate constant for the 1:1 complex formation has been determined. It is suggested that such kinetic parameter could be used to characterise the properties of metallochromic spiropyrans. |
| doi_str_mv | 10.1016/j.dyepig.2010.06.005 |
| format | Article |
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In degassed solution, a short-lived transient (5 μs) has been identified as the triplet state of the closed spiro form. The ratio between the singlet and triplet pathways of ring opening has been determined from oxygen quenching measurements. In the presence of Co(II), UV irradiation is needed to induce the complexation. The fast second order rate constant for the 1:1 complex formation has been determined. 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In degassed solution, a short-lived transient (5 μs) has been identified as the triplet state of the closed spiro form. The ratio between the singlet and triplet pathways of ring opening has been determined from oxygen quenching measurements. In the presence of Co(II), UV irradiation is needed to induce the complexation. The fast second order rate constant for the 1:1 complex formation has been determined. It is suggested that such kinetic parameter could be used to characterise the properties of metallochromic spiropyrans.</description><subject>Chemical Sciences</subject><subject>Complexation</subject><subject>Dyes</subject><subject>Mathematical models</subject><subject>Metal–ion complexation kinetics</subject><subject>Nanomaterials</subject><subject>Nanostructure</subject><subject>or physical chemistry</subject><subject>Photochromism</subject><subject>Ring opening</subject><subject>Spirobenzopyran</subject><subject>Spiropyran</subject><subject>Spiropyrans</subject><subject>Theoretical and</subject><issn>0143-7208</issn><issn>1873-3743</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><recordid>eNp9kc1u1DAUhS0EEkPhDVh4B11ksBPnjwXSaAR0xEhdtKwtx75pPEpsY7tV0xXvwAPwbn0SHFKxZGFZuvruOfY5CL2lZEsJrT6ctmoGp2-2OUkjUm0JKZ-hDW3qIitqVjxHG0JZkdU5aV6iVyGcCCFNkdMN-v1NG4ha4skqGEdtbrDtcRwAu8FGKwdvJx0mLIzCE0QxYmknN8K9iNqahRU4OO2tm70wOL3jI945N2q5AtH-Fdvb94fDOX78-QtfLbQ2yiYzyJR2A5h5tPfiwY7QgXl4kgpziDC9Ri96MQZ483Sfoe9fPl_vL7Lj5dfDfnfMZFHnMStB1iUjfTpd37ekrJlgnRAdhZqKsqW0zfuuBAqVki2hknaV7IiqS8FYzvriDJ2vuoMYufN6En7mVmh-sTvyZZYirWrKmjua2Hcr67z9cQsh8hSRTOkJA_Y28KaiyT8v20SylZTehuCh_ydNCV-q4ye-VseX6jipFp-09mldg_TjOw2eB6nBSFDag4xcWf1_gT-qEqhr</recordid><startdate>20110601</startdate><enddate>20110601</enddate><creator>Zakharova, M.I.</creator><creator>Coudret, C.</creator><creator>Pimienta, V.</creator><creator>Micheau, J.C.</creator><creator>Sliwa, M.</creator><creator>Poizat, O.</creator><creator>Buntinx, G.</creator><creator>Delbaere, S.</creator><creator>Vermeersch, G.</creator><creator>Metelitsa, A.V.</creator><creator>Voloshin, N.</creator><creator>Minkin, V.I.</creator><general>Elsevier Ltd</general><general>Elsevier</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7QQ</scope><scope>8FD</scope><scope>JG9</scope><scope>1XC</scope><orcidid>https://orcid.org/0000-0001-5134-5293</orcidid><orcidid>https://orcid.org/0000-0002-1193-4306</orcidid><orcidid>https://orcid.org/0000-0001-7334-5112</orcidid><orcidid>https://orcid.org/0000-0002-2138-7561</orcidid></search><sort><creationdate>20110601</creationdate><title>Kinetic modelling of the photochromism and metal complexation of a spiropyran dye: Application to the Co(II) – Spiroindoline-diphenyloxazolebenzopyran system</title><author>Zakharova, M.I. ; 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| source | Elsevier ScienceDirect Journals |
| subjects | Chemical Sciences Complexation Dyes Mathematical models Metal–ion complexation kinetics Nanomaterials Nanostructure or physical chemistry Photochromism Ring opening Spirobenzopyran Spiropyran Spiropyrans Theoretical and |
| title | Kinetic modelling of the photochromism and metal complexation of a spiropyran dye: Application to the Co(II) – Spiroindoline-diphenyloxazolebenzopyran system |
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