Gaseous and dissolved oxygen sensing with stabilized pyrene in ionic liquid modified electrospun slides

Özlem ÖTER; Gülhan Sabanci ŞAHİN

Makale detayları

Gaseous and dissolved oxygen sensing with stabilized pyrene in ionic liquid modified electrospun slides

Yazarlar:

Özlem ÖTER | Gülhan Sabanci ŞAHİN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Chemistry 2015 Vol.39 Issue 2

Belge Tipi:

Makale

Yayın Tarihi:

8/2015

Belge Dili:

Türkçe

Document ID (Org No.):

2000726940

Sıklık:

İki Aylık

eISSN:

1303-6130

pISSN:

1300-0527

Özet:

 

Pyrene dye has many superior characteristics for oxygen sensing studies such  as long fluorescence lifetime, high quantum yield, and good sensitivity. It  is preferred in some cases over ruthenium dyes for its more lipophilic  character and higher sensitivity. However, easy photodegradation of pyrene  is a challenging problem. In this study, pyrene dye was for the first time  immobilized in an ethyl cellulose matrix and used for oxygen sensing in the  form of thin films and electrospun sensing slides. The hydrophobic ionic  liquid 1-butyl-3-methylimidazolium hexafluorophosphate was used as additive  for the first time for dissolved oxygen sensing studies. The oxygen  sensitivity of the dye was evaluated with both steady state- and  fluorescence lifetime-based measurements. The sensing slides were stable for  45 min under continuous irradiation and could be stored for 100 days under  ambient laboratory conditions. This storage time is the longest reported  lifetime for pyrene-based sensors. The enhanced stability can be attributed  to the presence of ionic liquid, which behaves like a sink for oxidative,  reductive, acidic, and/or basic effects. The sensor response time was  between 6 and 20 s, depending on the oxygen concentration. The method can be  applied for both dissolved and gaseous oxygen measurements.

 

Pyrene dye has many superior characteristics for oxygen sensing studies such  as long fluorescence lifetime, high quantum yield, and good sensitivity. It  is preferred in some cases over ruthenium dyes for its more lipophilic  character and higher sensitivity. However, easy photodegradation of pyrene  is a challenging problem. In this study, pyrene dye was for the first time  immobilized in an ethyl cellulose matrix and used for oxygen sensing in the  form of thin films and electrospun sensing slides. The hydrophobic ionic  liquid 1-butyl-3-methylimidazolium hexafluorophosphate was used as additive  for the first time for dissolved oxygen sensing studies. The oxygen  sensitivity of the dye was evaluated with both steady state- and  fluorescence lifetime-based measurements. The sensing slides were stable for  45 min under continuous irradiation and could be stored for 100 days under  ambient laboratory conditions. This storage time is the longest reported  lifetime for pyrene-based sensors. The enhanced stability can be attributed  to the presence of ionic liquid, which behaves like a sink for oxidative,  reductive, acidic, and/or basic effects. The sensor response time was  between 6 and 20 s, depending on the oxygen concentration. The method can be  applied for both dissolved and gaseous oxygen measurements.

Makale detayları

Gaseous and dissolved oxygen sensing with stabilized pyrene in ionic liquid modified electrospun slides

Yazarlar: Özlem ÖTER | Gülhan Sabanci ŞAHİN

Yayıncı: TUBITAK

Dergi: Turkish Journal of Chemistry 2015 Vol.39 Issue 2

Belge Tipi: Makale

Yayın Tarihi: 8/2015

Belge Dili: Türkçe

Document ID (Org No.): 2000726940

Sıklık: İki Aylık

eISSN: 1303-6130

pISSN: 1300-0527

Sayı

Yazarlar:

Özlem ÖTER | Gülhan Sabanci ŞAHİN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Chemistry 2015 Vol.39 Issue 2

Belge Tipi:

Makale

Yayın Tarihi:

8/2015

Belge Dili:

Türkçe

Document ID (Org No.):

2000726940

Sıklık:

İki Aylık

eISSN:

1303-6130

pISSN:

1300-0527