폴리사카라이드의 기능기 차이에 따른 탄소점의 구조 발현 기구 연구

안정빈; 우정연; 김형섭; Jungbin Ahn; Jeongyeon Woo; Hyungsup Kim

Polymer(Korea), Vol.45, No.6, 849-856, November, 2021

DOI10.7317/pk.2021.45.6.849 Export Citation

폴리사카라이드의 기능기 차이에 따른 탄소점의 구조 발현 기구 연구

Study on Structural Difference of Carbon Dot Synthesized from Polysaccharide with Different Functional Groups

안정빈¹, 우정연^{1, 2}, 김형섭^{1, †}

¹건국대학교 공과대학 유기나노시스템공학과
²한국고분자시험연구소

Jungbin Ahn¹, Jeongyeon Woo^{1, 2}, and Hyungsup Kim^{1, †}

¹Department of Organic and Nano System Engineering, Konkuk University, Seoul 05029, Korea
²Korea Polymer Testing & Research Institute, Seoul 02633, Korea

E-mail:

초록

이온성 액체 내 폴리사카라이드의 용해 공정으로 탄소점을 제조하였다. 기본 골격은 동일하나 서로 다른 기능기를 갖는 4종의 폴리사카라이드를 사용하여 고분자의 구조적 차이에 의한 탄소점의 구조 형성의 차이를 분석하였다. 탄소점의 내/외부 구조의 발달을 설명하기 위해 고분자의 용해·분해 과정을 유변학적 거동을 통해 고찰하였다. 화학적/광학적 특성 분석 결과를 통해 탄소점으로의 재축합 과정 중 고분자 기능기의 다이폴 모먼트(dipole moment) 차이에 따라 질소 도핑된 내부 구조의 조절이 가능하며, 질소 기능기를 갖는 고분자를 사용할 경우 표면에 질소 기능기를 가지는 탄소점 구조가 발현됨을 확인하였다. 이러한 고찰은 타 고분자에 적용되어 목적 지향적 구조 발현을 위한 플랫폼으로 활용될 수 있을 것이다.

In this study, carbon dots were synthesized using different polysaccharides via ionic-liquid based solution process. Using the polymer structure with same glucose unit but different functional groups, synthesized carbon dots exhibited different chemical structures and optical properties. The rheological properties of the solutions were deeply analyzed to study the structure develop mechanism of core structure and functional group of carbon dot. N-doped core structure was obtained when imidazole ring participated in structural formation. When polysaccharides with N-functional groups (acetamide group and amino group) was used as precursors, N-containing functional groups were developed. The structural formation mechanism of carbon dot regarding the structural difference of polysaccharides can be applicable to the other polymers and can be utilized as a platform for purpose-oriented structure development.

Keywords:polysaccharide;carbon dot;rheology;structural development;optical property

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[2] Ding H, Wei JS, Zhang P, Zhou ZY, Gao QY, Xiong HM, Small, 14, 180061 (2018)

[3] Wang L, Li W, Yin L, et al., Sci. Adv., 6, eabb67 (2018)

[4] Himaja AL, Karthik PS, Sreedhar B, Singh SP, J. Fluoresc., 24, 1767 (2014)

[5] Sarswat PK, Free ML, Phys. Chem. Chem. Phys., 17, 27642 (2015)

[6] Li X, Zhang S, Kulinich SA, Liu Y, Zeng H, Sci. Rep., 4, 4976 (2014)

[7] Sachdev A, Matai I, Gopinath P, RSC. Adv., 4, 20915 (2014)

[8] Du F, Yuan J, Zhang M, et al., RSC. Adv., 4, 37536 (2014)

[9] Liu Q, Zhang N, Shi H, Ji W, Guo X, Yuan W, Hu Q, New. J. Chem., 42, 3097 (2018)

[10] Yang H, He L, Long Y, Li H, Pan S, Liu H, Hu X, Spectroc. Acta Pt. A-Molec. Biomolec. Spectr., 205, 12 (2018)

[11] Woo J, Song Y, Ahn J, Kim H, Cellulose, 27, 4609 (2020)

[12] Woo J, Kim H, Song Y, Fiber Polym., 21, 1643 (2020)

[13] Ahn Y, Kwak SY, Song Y, Kim H, Phys. Chem. Chem. Phys., 18, 1460 (2016)

[14] Meng Y, Pang Z, Dong C, Carbohydr. Polym., 163, 317 (2017)

[15] Ahn Y, Song Y, Kim H, ACS Macro Lett., 6, 762 (2017)

[16] Uto T, Idenoue S, Yamamoto K, Kadokawa JI, Phys. Chem. Chem. Phys., 20, 20669 (2018)

[17] Xu JH, Li SY, Tan LH, Kou B, Mater. Res. Bull., 93, 352 (2017)

[18] Xu Y, Li D, Liu M, Niu F, Liu J, Wang E, Sci. Rep., 7, 4499 (2017)

[19] Kim M, Hwang S, Yu JS, J. Mater. Chem., 17, 1656 (2007)

[20] Du H, Qian X, Carbphydr. Res., 346, 1985 (2011)

[21] Ding H, Yu SB, Wei JS, Xiong HM, ACS nano, 10, 484 (2016)

[22] Lin L, Zhang S, Chem. Comm., 48, 10177 (2012)

[23] Zhu B, Sun S, Wang Y, Deng S, Qian G, Wang M, Hu A, J. Mater. Chem. C, 1, 580 (2013)

[24] Ahn J, Song Y, Kwon JE, Lee SH, Park KS, Kim S, Woo J, Kim H, Mater. Sci. Eng. C-Biomimetic Supramol. Syst., 102, 106 (2019)