Details
| Original language | English |
|---|---|
| Pages (from-to) | 6842-6851 |
| Number of pages | 10 |
| Journal | The Journal of Physical Chemistry A |
| Volume | 122 |
| Issue number | 34 |
| Early online date | 3 Aug 2018 |
| Publication status | Published - 30 Aug 2018 |
Abstract
The photophysical behavior and reactive oxygen species (ROS) generation by chloroaluminum phthalocyanine (AlClPc) are evaluated by steady state absorption/emission, transient emission, and electron paramagnetic resonance spectroscopies in the presence of graphene oxide (GO), reduced graphene oxide (RGO), and carboxylated nanographene oxide (NGO). AlClPc and graphene oxides form a supramolecular structure stabilized by I-I interactions, which quantitatively quenches fluorescence emission and suppresses ROS generation. These effects occur even when graphenes are previously functionalized with Pluronic F-127. A small part of quenching is due to an inner filter effect, in which graphene oxides compete with AlClPc for light absorption. Nonetheless, most of the (static) quenching arises on the formation of a nonemissive ground state complex between AlClPc and graphene oxides. The efficiency of graphene oxides on the fluorescence quenching and ROS generation suppression follows the order: GO < NGO < RGO.
ASJC Scopus subject areas
- Chemistry(all)
- Physical and Theoretical Chemistry
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In: The Journal of Physical Chemistry A, Vol. 122, No. 34, 30.08.2018, p. 6842-6851.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Quenching Effects of Graphene Oxides on the Fluorescence Emission and Reactive Oxygen Species Generation of Chloroaluminum Phthalocyanine
AU - Baggio, Alan R.
AU - Santos, Mayara S. C.
AU - Souza, Fabiane H. V.
AU - Nunes, Rodrigo B.
AU - Souza, Paulo Eduardo N.
AU - Báo, Sônia N.
AU - Patrocinio, Antonio Otavio T.
AU - Bahnemann, Detlef W.
AU - Silva, Luciano P.
AU - Sales, Maria José A.
AU - Paterno, Leonardo G.
N1 - Funding information: The authors acknowledge the financial support of the Brazilian funding agencies CNPq (process n.308038/2012-6), CAPES, FAP-DF (process n. 0193.000829/2015), and FINEP (process n. 01/13/0470/00). A.O.T.P. is thankful to the Alexander Von Humboldt Foundation for the fellowship in Germany.
PY - 2018/8/30
Y1 - 2018/8/30
N2 - The photophysical behavior and reactive oxygen species (ROS) generation by chloroaluminum phthalocyanine (AlClPc) are evaluated by steady state absorption/emission, transient emission, and electron paramagnetic resonance spectroscopies in the presence of graphene oxide (GO), reduced graphene oxide (RGO), and carboxylated nanographene oxide (NGO). AlClPc and graphene oxides form a supramolecular structure stabilized by I-I interactions, which quantitatively quenches fluorescence emission and suppresses ROS generation. These effects occur even when graphenes are previously functionalized with Pluronic F-127. A small part of quenching is due to an inner filter effect, in which graphene oxides compete with AlClPc for light absorption. Nonetheless, most of the (static) quenching arises on the formation of a nonemissive ground state complex between AlClPc and graphene oxides. The efficiency of graphene oxides on the fluorescence quenching and ROS generation suppression follows the order: GO < NGO < RGO.
AB - The photophysical behavior and reactive oxygen species (ROS) generation by chloroaluminum phthalocyanine (AlClPc) are evaluated by steady state absorption/emission, transient emission, and electron paramagnetic resonance spectroscopies in the presence of graphene oxide (GO), reduced graphene oxide (RGO), and carboxylated nanographene oxide (NGO). AlClPc and graphene oxides form a supramolecular structure stabilized by I-I interactions, which quantitatively quenches fluorescence emission and suppresses ROS generation. These effects occur even when graphenes are previously functionalized with Pluronic F-127. A small part of quenching is due to an inner filter effect, in which graphene oxides compete with AlClPc for light absorption. Nonetheless, most of the (static) quenching arises on the formation of a nonemissive ground state complex between AlClPc and graphene oxides. The efficiency of graphene oxides on the fluorescence quenching and ROS generation suppression follows the order: GO < NGO < RGO.
UR - http://www.scopus.com/inward/record.url?scp=85052298322&partnerID=8YFLogxK
U2 - 10.1021/acs.jpca.8b05660
DO - 10.1021/acs.jpca.8b05660
M3 - Article
VL - 122
SP - 6842
EP - 6851
JO - The Journal of Physical Chemistry A
JF - The Journal of Physical Chemistry A
SN - 1520-5215
IS - 34
ER -