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A Soluble ‘Ba(Ni-ett)’ (ett = 1,1,2,2-Ethenetetrathiolate) Derived Thermoelectric Material

Hu, Yaoyang; Rivers, Geoffrey; Weir, Michael P.; Amabilino, David B.; Tuck, Christopher J.; Wildman, Ricky D.; Makarovsky, Oleg; Woodward, Simon

A Soluble ‘Ba(Ni-ett)’ (ett = 1,1,2,2-Ethenetetrathiolate) Derived Thermoelectric Material Thumbnail


Yaoyang Hu

David B. Amabilino

Professor of Materials Engineering

Professor of Multiphase Flow and Mechanics

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Professor of Synthetic Organic Chemistry


We describe the synthesis and characterisation of the first of a new class of soluble ladder oligomeric thermoelectric material based on previously unutilised ethene-1,1,2,2-tetrasulfonic acid. Reaction of Ba(OH)2 and propionic acid at a 1:1 stoichiometry leads to the formation of the previously unrecognised soluble [Ba(OH)(O2CEt)]⋅H2O. The latter when used to hydrolyse 1,3,4,6-tetrathiapentalene-2,5-dione (TPD), in the presence of NiCl2, forms a new material whose elemental composition is in accord with the formula [(EtCO2Ba)4Ni8{(O3S)2C = C(SO3)2}5]⋅22H2O (4). Compound 4 can be pressed into pellets, drop-cast as DMSO solutions or ink-jet printed (down to sub-mm resolutions). While its room temperature thermoelectric properties are modest (σmax 0.04 S cm−1 and Seebeck coefficient, αmax − 25.8 μV K−1) we introduce a versatile new oligomeric material that opens new possible synthetic routes for n-type thermoelectrics.


Hu, Y., Rivers, G., Weir, M. P., Amabilino, D. B., Tuck, C. J., Wildman, R. D., …Woodward, S. (2023). A Soluble ‘Ba(Ni-ett)’ (ett = 1,1,2,2-Ethenetetrathiolate) Derived Thermoelectric Material. Electronic Materials Letters,

Journal Article Type Article
Acceptance Date Aug 9, 2023
Online Publication Date Sep 1, 2023
Publication Date Sep 1, 2023
Deposit Date Sep 8, 2023
Publicly Available Date Sep 12, 2023
Journal Electronic Materials Letters
Electronic ISSN 2093-6788
Publisher Springer Verlag
Peer Reviewed Peer Reviewed
Keywords Organic thermoelectric; Oligomer; n-Type; Nickel; Barium; Thiolate
Public URL
Additional Information Received: 31 May 2023; Accepted: 9 August 2023; First Online: 1 September 2023; : ; : The authors have no competing interests to declare.


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