Laser flash photolysis study of the photoinduced oxidation of
4-(dimethylamino)benzonitrile (DMABN)

J 2019

Laser flash photolysis study of the photoinduced oxidation of 4-(dimethylamino)benzonitrile (DMABN)

LERESCHE, Frank; Lucie LUDVÍKOVÁ; Dominik HEGER; Petr KLÁN; Urs VON GUNTEN et. al.

Základní údaje

Originální název

Laser flash photolysis study of the photoinduced oxidation of 4-(dimethylamino)benzonitrile (DMABN)

Autoři

LERESCHE, Frank (756 Švýcarsko); Lucie LUDVÍKOVÁ (203 Česká republika, domácí); Dominik HEGER (203 Česká republika, domácí); Petr KLÁN (203 Česká republika, garant, domácí); Urs VON GUNTEN (756 Švýcarsko) a Silvio CANONICA (756 Švýcarsko)

Vydání

PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES, Cambridge, ROYAL SOC CHEMISTRY, 2019, 1474-905X

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10403 Physical chemistry

Stát vydavatele

Velká Británie a Severní Irsko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

Full Text

Impakt faktor

Impact factor: 2.831

Kód RIV

RIV/00216224:14310/19:00109353

Organizační jednotka

Přírodovědecká fakulta

DOI

http://dx.doi.org/10.1039/c8pp00519b

UT WoS

000458569100026

EID Scopus

2-s2.0-85061394130

Klíčová slova česky

laser flash photolysis

Klíčová slova anglicky

laser flash photolysis

Štítky

rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 17. 2. 2023 20:59, Mgr. Michaela Hylsová, Ph.D.

Anotace

V originále

Aromatic amines are aquatic contaminants for which phototransformation in surface waters can be induced by excited triplet states of dissolved organic matter ((DOM)-D-3*). The first reaction step is assumed to consist of a one-electron oxidation process of the amine to produce its radical cation. In this paper, we present laser flash photolysis investigations aimed at characterizing the photoinduced, aqueous phase one-electron oxidation of 4-(dimethylamino) benzonitrile (DMABN) as a representative of this contaminant class. The production of the radical cation of DMABN (DMABN(center dot+)) after direct photoexcitation of DMABN at 266 nm was confirmed in accord with previous experimental results. Moreover, DMABN(center dot+) was shown to be produced from the reactions of several excited triplet photosensitizers (carbonyl compounds) with DMABN. Second-order rate constants for the quenching of the excited triplet states by DMABN were determined to fall in the range of 3 x 10(7)-5 x 10(9) M-1 s(-1), and their variation was interpreted in terms of electron transfer theory using a Rehm-Weller relationship. The decay kinetics of DMABN(-+) in the presence of oxygen was dominated by a second-order component attributed to its reaction with the superoxide radical anion (O-2(center dot-)). The first-order rate constant for the transformation of DMABN(center dot+) leading to photodegradation of DMABN was estimated not to exceed approximate to 5 x 10(3) s(-1).

Návaznosti

LM2011028, projekt VaV

Název: RECETOX ? Národní infrastruktura pro výzkum toxických látek v prostředí

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, RECETOX Národní infrastruktura pro výzkum toxických látek v prostředí

LO1214, projekt VaV

Název: Centrum pro výzkum toxických látek v prostředí (Akronym: RECETOX)

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, Centrum pro výzkum toxických látek v prostředí

Citovat

LERESCHE, Frank; Lucie LUDVÍKOVÁ; Dominik HEGER; Petr KLÁN; Urs VON GUNTEN a Silvio CANONICA. Laser flash photolysis study of the photoinduced oxidation of 4-(dimethylamino)benzonitrile (DMABN). PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES. Cambridge: ROYAL SOC CHEMISTRY, 2019, roč. 18, č. 2, s. 534-545. ISSN 1474-905X. Dostupné z: https://dx.doi.org/10.1039/c8pp00519b.

@article{1511177,
   author = {Leresche, Frank and Ludvíková, Lucie and Heger, Dominik and Klán, Petr and von Gunten, Urs and Canonica, Silvio},
   article_location = {Cambridge},
   article_number = {2},
   doi = {http://dx.doi.org/10.1039/c8pp00519b},
   keywords = {laser flash photolysis},
   language = {eng},
   issn = {1474-905X},
   journal = {PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES},
   title = {Laser flash photolysis study of the photoinduced oxidation of 4-(dimethylamino)benzonitrile (DMABN)},
   url = {https://pubs.rsc.org/en/content/articlelanding/2019/PP/C8PP00519B#!divAbstract},
   volume = {18},
   year = {2019}
}

TY  - JOUR
ID  - 1511177
AU  - Leresche, Frank - Ludvíková, Lucie - Heger, Dominik - Klán, Petr - von Gunten, Urs - Canonica, Silvio
PY  - 2019
TI  - Laser flash photolysis study of the photoinduced oxidation of 4-(dimethylamino)benzonitrile (DMABN)
JF  - PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES
VL  - 18
IS  - 2
SP  - 534-545
EP  - 534-545
PB  - ROYAL SOC CHEMISTRY
SN  - 1474905X
KW  - laser flash photolysis
UR  - https://pubs.rsc.org/en/content/articlelanding/2019/PP/C8PP00519B#!divAbstract
L2  - https://pubs.rsc.org/en/content/articlelanding/2019/PP/C8PP00519B#!divAbstract
N2  - Aromatic amines are aquatic contaminants for which phototransformation in surface waters can be induced by excited triplet states of dissolved organic matter ((DOM)-D-3*). The first reaction step is assumed to consist of a one-electron oxidation process of the amine to produce its radical cation. In this paper, we present laser flash photolysis investigations aimed at characterizing the photoinduced, aqueous phase one-electron oxidation of 4-(dimethylamino) benzonitrile (DMABN) as a representative of this contaminant class. The production of the radical cation of DMABN (DMABN(center dot+)) after direct photoexcitation of DMABN at 266 nm was confirmed in accord with previous experimental results. Moreover, DMABN(center dot+) was shown to be produced from the reactions of several excited triplet photosensitizers (carbonyl compounds) with DMABN. Second-order rate constants for the quenching of the excited triplet states by DMABN were determined to fall in the range of 3 x 10(7)-5 x 10(9) M-1 s(-1), and their variation was interpreted in terms of electron transfer theory using a Rehm-Weller relationship. The decay kinetics of DMABN(-+) in the presence of oxygen was dominated by a second-order component attributed to its reaction with the superoxide radical anion (O-2(center dot-)). The first-order rate constant for the transformation of DMABN(center dot+) leading to photodegradation of DMABN was estimated not to exceed approximate to 5 x 10(3) s(-1).
ER  -

LERESCHE, Frank; Lucie LUDVÍKOVÁ; Dominik HEGER; Petr KLÁN; Urs VON GUNTEN a Silvio CANONICA. Laser flash photolysis study of the photoinduced oxidation of 4-(dimethylamino)benzonitrile (DMABN). \textit{PHOTOCHEMICAL \&{} PHOTOBIOLOGICAL SCIENCES}. Cambridge: ROYAL SOC CHEMISTRY, 2019, roč.~18, č.~2, s.~534-545. ISSN~1474-905X. Dostupné z: https://dx.doi.org/10.1039/c8pp00519b.

Přehled o publikaci