TY - JOUR

T1 - Dual-Purpose Sensing Nanoprobe Based on Carbon Dots from o-Phenylenediamine

T2 - pH and Solvent Polarity Measurement

AU - Vedernikova, Anna A.

AU - Miruschenko, Mikhail D.

AU - Arefina, Irina A.

AU - Babaev, Anton A.

AU - Stepanidenko, Evgeniia A.

AU - Cherevkov, Sergei A.

AU - Spiridonov, Igor G.

AU - Danilov, Denis V.

AU - Koroleva, Aleksandra V.

AU - Zhizhin, Evgeniy V.

AU - Ushakova, Elena V.

N1 - Vedernikova, A.A.; Miruschenko, M.D.; Arefina, I.A.; Babaev, A.A.; Stepanidenko, E.A.; Cherevkov, S.A.; Spiridonov, I.G.; Danilov, D.V.; Koroleva, A.V.; Zhizhin, E.V.; Ushakova, E.V. Dual-Purpose Sensing Nanoprobe Based on Carbon Dots from o-Phenylenediamine: pH and Solvent Polarity Measurement. Nanomaterials 2022, 12, 3314. https://doi.org/10.3390/nano12193314

PY - 2022/9/23

Y1 - 2022/9/23

N2 - Today, the development of nanomaterials with sensing properties attracts much scientific interest because of the demand for low-cost nontoxic colloidal nanoprobes with high sensitivity and selectivity for various biomedical and environment-related applications. Carbon dots (CDs) are promising candidates for these applications as they demonstrate unique optical properties with intense emissions, biocompatibility, and ease of fabrication. Herein, we developed synthesis protocols to obtain CDs based on o-phenylenediamine with a variety of optical responses depending on additional precursors and changes in the reaction media. The obtained CDs are N-doped (N,S-doped in case of thiourea addition) less than 10 nm spherical particles with emissions observed in the 300–600 nm spectral region depending on their chemical composition. These CDs may act simultaneously as absorptive/fluorescent sensing probes for solvent polarity with (Formula presented.) up to 85, for (Formula presented.) from 0.099 to 1.0 and for pH values in the range of 3.0–8.0, thus opening an opportunity to check the pH in non-pure water or a mixture of solvents. Moreover, CDs preserve their optical properties when embedded in cellulose strips that can be used as sensing probes for fast and easy pH checks. We believe that the resulting dual-purpose sensing nano probes based on CDs will have high demand in various sensing applications.

AB - Today, the development of nanomaterials with sensing properties attracts much scientific interest because of the demand for low-cost nontoxic colloidal nanoprobes with high sensitivity and selectivity for various biomedical and environment-related applications. Carbon dots (CDs) are promising candidates for these applications as they demonstrate unique optical properties with intense emissions, biocompatibility, and ease of fabrication. Herein, we developed synthesis protocols to obtain CDs based on o-phenylenediamine with a variety of optical responses depending on additional precursors and changes in the reaction media. The obtained CDs are N-doped (N,S-doped in case of thiourea addition) less than 10 nm spherical particles with emissions observed in the 300–600 nm spectral region depending on their chemical composition. These CDs may act simultaneously as absorptive/fluorescent sensing probes for solvent polarity with (Formula presented.) up to 85, for (Formula presented.) from 0.099 to 1.0 and for pH values in the range of 3.0–8.0, thus opening an opportunity to check the pH in non-pure water or a mixture of solvents. Moreover, CDs preserve their optical properties when embedded in cellulose strips that can be used as sensing probes for fast and easy pH checks. We believe that the resulting dual-purpose sensing nano probes based on CDs will have high demand in various sensing applications.

KW - carbon dots

KW - pH measurement

KW - pH test strip

KW - protonation

KW - sensorics

KW - solvatochromism

UR - http://www.scopus.com/inward/record.url?scp=85139929457&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/9a1bf351-d5fd-3665-898f-0ed2a19597bd/

U2 - 10.3390/nano12193314

DO - 10.3390/nano12193314

M3 - Article

C2 - 36234443

AN - SCOPUS:85139929457

VL - 12

JO - Nanomaterials

JF - Nanomaterials

SN - 2079-4991

IS - 19

M1 - 3314

ER -