TY - JOUR

T1 - Self-cross-linkable ferrocenyl-containing polysiloxanes as flexible electrochromic materials

AU - Deriabin, Konstantin V.

AU - Vereshchagin, Anatoliy A.

AU - Kirichenko, Sergey O.

AU - Rashevskii, Artem A.

AU - Levin, Oleg V.

AU - Islamova, Regina

PY - 2023/4

Y1 - 2023/4

N2 - Flexible ferrocenyl-containing silicone rubbers (FSRs) with various ferrocenylsubstituted unit contents of 25, 50, and 75 mol.% were obtained by applying a simple method included catalytic hydrosilylation (between polymethylhydrosiloxane and vinylferrocene) and self-cross-linking reactions (dehydrocoupling between Si–H groups). Self-cross-linking is one of the most suitable and simple methods to coat and obtain FSRs on various contact conductive surfaces, such as onto ITO glass or ITOPET. The synthesized FSRs exhibit the electrochromic (EC) properties, resulting from the reduction-oxidation of ferrocenyl groups (Fc/Fc+ transformations at E0 c.a. 0.36 V) and leading to color change: oxidation causes new band formation at 634 nm in UV-visspectra. FSR with ferrocenyl-substituted unit content of 50 mol.% (FSR50) is the most optimal in terms of EC (coloration efficiency of 10.98 cm2·C–1, coloring and bleaching times of c.a. 49 and 66 s, which are close to undoped oligoaniline-functionalized polysiloxanes and carbazolyl-modified polysiloxanes) and mechanical properties (the tensile strength, Young’s modulus and elongation at break are 2.80 MPa, 25.33 MPa, and c.a. 50%, respectively). The previously reported EC polysiloxanes have lack of mechanical characteristics. Both electrochromism and flexibility predominantly make FSR50 promising materials for creation of flexible and stretchable EC devices.

AB - Flexible ferrocenyl-containing silicone rubbers (FSRs) with various ferrocenylsubstituted unit contents of 25, 50, and 75 mol.% were obtained by applying a simple method included catalytic hydrosilylation (between polymethylhydrosiloxane and vinylferrocene) and self-cross-linking reactions (dehydrocoupling between Si–H groups). Self-cross-linking is one of the most suitable and simple methods to coat and obtain FSRs on various contact conductive surfaces, such as onto ITO glass or ITOPET. The synthesized FSRs exhibit the electrochromic (EC) properties, resulting from the reduction-oxidation of ferrocenyl groups (Fc/Fc+ transformations at E0 c.a. 0.36 V) and leading to color change: oxidation causes new band formation at 634 nm in UV-visspectra. FSR with ferrocenyl-substituted unit content of 50 mol.% (FSR50) is the most optimal in terms of EC (coloration efficiency of 10.98 cm2·C–1, coloring and bleaching times of c.a. 49 and 66 s, which are close to undoped oligoaniline-functionalized polysiloxanes and carbazolyl-modified polysiloxanes) and mechanical properties (the tensile strength, Young’s modulus and elongation at break are 2.80 MPa, 25.33 MPa, and c.a. 50%, respectively). The previously reported EC polysiloxanes have lack of mechanical characteristics. Both electrochromism and flexibility predominantly make FSR50 promising materials for creation of flexible and stretchable EC devices.

KW - ferrocenyl-containing polysiloxanes

KW - self-cross-linking

KW - electrochromic materials

KW - electrode materials

KW - electrochemical properties

KW - Ferrocenyl-containing polysiloxanes

KW - Electrochemical properties

KW - Electrode materials

KW - Self-cross-linking

KW - Electrochromic materials

UR - https://www.mendeley.com/catalogue/a7b15ea2-cc99-32f4-9c81-5fcfbd885dd4/

U2 - 10.1016/j.mtchem.2023.101399

DO - 10.1016/j.mtchem.2023.101399

M3 - Article

VL - 29

SP - 101399

JO - Materials Today Chemistry

JF - Materials Today Chemistry

SN - 2468-5194

ER -