Titania-Catalyzed H<sub>2</sub>O<sub>2</sub> Thermal Oxidation of Styrenes to Aldehydes

Titania-Catalyzed H<sub>2</sub>O<sub>2</sub> Thermal Oxidation of Styrenes to Aldehydes

We investigated the selective oxidation of styrenes to benzaldehydes by using a non-irradiated TiO<sub>2</sub>&#8722;H<sub>2</sub>O<sub>2</sub> catalytic system. The oxidation promotes multi-step reactions from styrenes, including the cleavage of a C=C double...

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Main Authors: Satoru Ito, Yoshihiro Kon, Takuya Nakashima, Dachao Hong, Hideo Konno, Daisuke Ino, Kazuhiko Sato
Format: Article
Language:English
Published: MDPI AG 2019-07-01
Series:Molecules
Subjects:
titanium dioxide
hydrogen peroxide
styrenes
benzaldehydes
non-irradiated oxidation
heterogeneous catalyst
Online Access:https://www.mdpi.com/1420-3049/24/14/2520
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spelling doaj-78bcfe9523af4dc7b0195850adfd04c32020-11-25T01:53:40ZengMDPI AGMolecules1420-30492019-07-012414252010.3390/molecules24142520molecules24142520Titania-Catalyzed H<sub>2</sub>O<sub>2</sub> Thermal Oxidation of Styrenes to AldehydesSatoru Ito0Yoshihiro Kon1Takuya Nakashima2Dachao Hong3Hideo Konno4Daisuke Ino5Kazuhiko Sato6Institute for Energy and Material/Food Resources, Technology Innovation Division, Panasonic Corporation, 3-4 Hikaridai, Seika-cho, Soraku-gun, Kyoto 619-0237, JapanInterdisciplinary Research Center for Catalytic Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, JapanInterdisciplinary Research Center for Catalytic Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, JapanInterdisciplinary Research Center for Catalytic Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, JapanInterdisciplinary Research Center for Catalytic Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, JapanInstitute for Energy and Material/Food Resources, Technology Innovation Division, Panasonic Corporation, 3-4 Hikaridai, Seika-cho, Soraku-gun, Kyoto 619-0237, JapanInterdisciplinary Research Center for Catalytic Chemistry, National Institute of Advanced Industrial Science and Technology (AIST), Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, JapanWe investigated the selective oxidation of styrenes to benzaldehydes by using a non-irradiated TiO<sub>2</sub>&#8722;H<sub>2</sub>O<sub>2</sub> catalytic system. The oxidation promotes multi-step reactions from styrenes, including the cleavage of a C=C double bond and the addition of an oxygen atom selectively and stepwise to provide the corresponding benzaldehydes in good yields (up to 72%). These reaction processes were spectroscopically shown by fluorescent measurements under the presence of competitive scavengers. The absence of the signal from OH radicals indicates the participation of other oxidants such as hydroperoxy radicals (&#8226;OOH) and superoxide radicals (&#8226;O<sub>2</sub><sup>&#8722;</sup>) into the selective oxidation from styrene to benzaldehyde.https://www.mdpi.com/1420-3049/24/14/2520titanium dioxidehydrogen peroxidestyrenesbenzaldehydesnon-irradiated oxidationheterogeneous catalyst
collection DOAJ
language English
format Article
sources DOAJ
author Satoru Ito
Yoshihiro Kon
Takuya Nakashima
Dachao Hong
Hideo Konno
Daisuke Ino
Kazuhiko Sato
spellingShingle Satoru Ito
Yoshihiro Kon
Takuya Nakashima
Dachao Hong
Hideo Konno
Daisuke Ino
Kazuhiko Sato
Titania-Catalyzed H<sub>2</sub>O<sub>2</sub> Thermal Oxidation of Styrenes to Aldehydes
Molecules
titanium dioxide
hydrogen peroxide
styrenes
benzaldehydes
non-irradiated oxidation
heterogeneous catalyst
author_facet Satoru Ito
Yoshihiro Kon
Takuya Nakashima
Dachao Hong
Hideo Konno
Daisuke Ino
Kazuhiko Sato
author_sort Satoru Ito
title Titania-Catalyzed H<sub>2</sub>O<sub>2</sub> Thermal Oxidation of Styrenes to Aldehydes
title_short Titania-Catalyzed H<sub>2</sub>O<sub>2</sub> Thermal Oxidation of Styrenes to Aldehydes
title_full Titania-Catalyzed H<sub>2</sub>O<sub>2</sub> Thermal Oxidation of Styrenes to Aldehydes
title_fullStr Titania-Catalyzed H<sub>2</sub>O<sub>2</sub> Thermal Oxidation of Styrenes to Aldehydes
title_full_unstemmed Titania-Catalyzed H<sub>2</sub>O<sub>2</sub> Thermal Oxidation of Styrenes to Aldehydes
title_sort titania-catalyzed h<sub>2</sub>o<sub>2</sub> thermal oxidation of styrenes to aldehydes
publisher MDPI AG
series Molecules
issn 1420-3049
publishDate 2019-07-01
description We investigated the selective oxidation of styrenes to benzaldehydes by using a non-irradiated TiO<sub>2</sub>&#8722;H<sub>2</sub>O<sub>2</sub> catalytic system. The oxidation promotes multi-step reactions from styrenes, including the cleavage of a C=C double bond and the addition of an oxygen atom selectively and stepwise to provide the corresponding benzaldehydes in good yields (up to 72%). These reaction processes were spectroscopically shown by fluorescent measurements under the presence of competitive scavengers. The absence of the signal from OH radicals indicates the participation of other oxidants such as hydroperoxy radicals (&#8226;OOH) and superoxide radicals (&#8226;O<sub>2</sub><sup>&#8722;</sup>) into the selective oxidation from styrene to benzaldehyde.
topic titanium dioxide
hydrogen peroxide
styrenes
benzaldehydes
non-irradiated oxidation
heterogeneous catalyst
url https://www.mdpi.com/1420-3049/24/14/2520
work_keys_str_mv AT satoruito titaniacatalyzedhsub2subosub2subthermaloxidationofstyrenestoaldehydes
AT yoshihirokon titaniacatalyzedhsub2subosub2subthermaloxidationofstyrenestoaldehydes
AT takuyanakashima titaniacatalyzedhsub2subosub2subthermaloxidationofstyrenestoaldehydes
AT dachaohong titaniacatalyzedhsub2subosub2subthermaloxidationofstyrenestoaldehydes
AT hideokonno titaniacatalyzedhsub2subosub2subthermaloxidationofstyrenestoaldehydes
AT daisukeino titaniacatalyzedhsub2subosub2subthermaloxidationofstyrenestoaldehydes
AT kazuhikosato titaniacatalyzedhsub2subosub2subthermaloxidationofstyrenestoaldehydes
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