Surface Coating with Naphthalene Trisulfonate/Hafnium(IV) Complexes: Versatility and Post-Functionalization

Naphthalene trisulfonate is found to have versatile surface coating capability when combined with hafnium­(IV) ions, thereby forming complexes. Solid substrates such as titanium/titanium dioxide, glass, and nylon immersed in a solution of naphthalene trisulfonate and HfIV produces naphthalene trisul...

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Bibliographic Details
Published in:Langmuir 2022-10, Vol.38 (41), p.12711-12716
Main Authors: Kim, Yejin, Jeong, Yeonwoo, Kang, Sung Min
Format: Article
Language:English
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Summary:Naphthalene trisulfonate is found to have versatile surface coating capability when combined with hafnium­(IV) ions, thereby forming complexes. Solid substrates such as titanium/titanium dioxide, glass, and nylon immersed in a solution of naphthalene trisulfonate and HfIV produces naphthalene trisulfonate/HfIV complex coating. The coating is not produced when the HfIV ions are absent or when naphthalene monosulfonate replaces naphthalene trisulfonate; this indicates the significance of HfIV ions and multiple sulfonates in this coating system. The versatile surface coating property of naphthalene trisulfonate/HfIV complexes is attributed to the coexistence of hydrophobic aromatic and hydrophilic side groups in naphthalene trisulfonate. Additionally, HfIV ion-mediated cross-linking reactions between naphthalene trisulfonate molecules induce molecular assembly, facilitating versatile surface coating. Post-functionalization of the coating is accomplished through additional HfIV-mediated coordinate bond formation; alginate and λ-carrageenan are successfully grafted onto the coating for nonbiofouling applications.
ISSN:0743-7463
1520-5827
DOI:10.1021/acs.langmuir.2c02336