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A Soluble ‘Ba(Ni-ett)’ (ett = 1,1,2,2-ethenetetrathiolate) Derived Thermoelectric Material
Yaoyang Hu,Geoffrey Rivers,Michael P. Weir,David B. Amabilino,Christopher J. Tuck,Ricky D. Wildman,Oleg Makarovsky,Simon Woodward 대한금속·재료학회 2024 ELECTRONIC MATERIALS LETTERS Vol.20 No.2
We describe the synthesis and characterisation of the fi rst of a new class of soluble ladder oligomeric thermoelectric materialbased on previously unutilised ethene-1,1,2,2-tetrasulfonic acid. Reaction of Ba(OH) 2 and propionic acid at a 1:1 stoichiometryleads to the formation of the previously unrecognised soluble [Ba(OH)(O 2 CEt)] H 2 O. The latter when used to hydrolyse1,3,4,6-tetrathiapentalene-2,5-dione (TPD), in the presence of NiCl 2 , forms a new material whose elemental compositionis in accord with the formula [(EtCO 2 Ba) 4 Ni 8 {(O 3 S) 2 C = C(SO 3 ) 2 } 5 ] 22H 2 O ( 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 thermoelectricproperties are modest (σ max 0.04 S cm −1 and Seebeck coeffi cient, α max − 25.8 μV K −1 ) we introduce a versatile new oligomericmaterial that opens new possible synthetic routes for n-type thermoelectrics.