TY - JOUR
T1 - Influence of the Molecular Framework on the Photoconductivity Responses of Five Cu/Ni and Fe Heterometallic Materials Built with Cyanide and Ethylenediamine
AU - Temitope Famojuro, Adetokunbo
AU - Kenfack Tsobnang, Patrice
AU - Tchatchouang Tchouane, Loïc Landry
AU - Amenuvor, Gershon
AU - Darkwa, James
AU - Arotiba, Omotayo A.
N1 - Publisher Copyright:
© 2025 American Chemical Society.
PY - 2025
Y1 - 2025
N2 - The contribution of weak interactions in the photoconductive property of hybrid materials is clearly shown in this work with five materials having the same units but different connection modes: [Ni(en)3]3[Fe(CN)6]2 ·5H2O (1N), {[Ni(en)2]3[Fe(CN)6]2}n·3H2O (2N), [Cu(en)2(H2O)1.935]2 [Fe(CN)6]· 4H2O (3N), {[Cu(en)2][KFe(CN)6]}n (4N), and {[Cu(en)2]2[Fe(CN)6]· 4.5H2O}n (5N); en = ethylenediamine (C2H8N2); 1N and 3N are supramolecular compounds while 2N, 4N, and 5N are coordination polymers. 1N is a new material while 2N, 3N, 4N, and 5N were already reported with different synthesis methods. In the structure of 1N, two [Fe(CN)6]3- anionic units over three crystallographic sites (noted A-, B-, and C-) and three cationic [Ni(C2H8N2)3]2+ units (noted A+, B+, and C+) are involved. They build infinite chains with the packing of the B+-A-- A+-C-- A+- A--B+ units connected with the C+-B--C+ short units. This packing results in zigzag 2D arrays running along the [010] direction and stacked along the [100] direction with the water molecules located between them. 4N exhibits a one-electron quasi-reversible redox process while 1N, 2N, 3N, and 5N show multielectron processes in which the redox couples Cu2+/Cu3+ or Ni2+/Ni3+, Fe2+/Fe3+, and Fe3+/Fe4+ are involved. All these compounds are photoactive; 1N and 3N, which are built from hydrogen bonds, produced higher faradaic current with illumination than the materials 2N, 4N, and 5N, which are built with coordinative bonds. The solid-state photoconductivity of 3N shows a current increase as the voltage increases in the presence of light, while no real response was observed without light.
AB - The contribution of weak interactions in the photoconductive property of hybrid materials is clearly shown in this work with five materials having the same units but different connection modes: [Ni(en)3]3[Fe(CN)6]2 ·5H2O (1N), {[Ni(en)2]3[Fe(CN)6]2}n·3H2O (2N), [Cu(en)2(H2O)1.935]2 [Fe(CN)6]· 4H2O (3N), {[Cu(en)2][KFe(CN)6]}n (4N), and {[Cu(en)2]2[Fe(CN)6]· 4.5H2O}n (5N); en = ethylenediamine (C2H8N2); 1N and 3N are supramolecular compounds while 2N, 4N, and 5N are coordination polymers. 1N is a new material while 2N, 3N, 4N, and 5N were already reported with different synthesis methods. In the structure of 1N, two [Fe(CN)6]3- anionic units over three crystallographic sites (noted A-, B-, and C-) and three cationic [Ni(C2H8N2)3]2+ units (noted A+, B+, and C+) are involved. They build infinite chains with the packing of the B+-A-- A+-C-- A+- A--B+ units connected with the C+-B--C+ short units. This packing results in zigzag 2D arrays running along the [010] direction and stacked along the [100] direction with the water molecules located between them. 4N exhibits a one-electron quasi-reversible redox process while 1N, 2N, 3N, and 5N show multielectron processes in which the redox couples Cu2+/Cu3+ or Ni2+/Ni3+, Fe2+/Fe3+, and Fe3+/Fe4+ are involved. All these compounds are photoactive; 1N and 3N, which are built from hydrogen bonds, produced higher faradaic current with illumination than the materials 2N, 4N, and 5N, which are built with coordinative bonds. The solid-state photoconductivity of 3N shows a current increase as the voltage increases in the presence of light, while no real response was observed without light.
UR - http://www.scopus.com/inward/record.url?scp=105002686107&partnerID=8YFLogxK
U2 - 10.1021/acs.cgd.5c00134
DO - 10.1021/acs.cgd.5c00134
M3 - Article
AN - SCOPUS:105002686107
SN - 1528-7483
JO - Crystal Growth and Design
JF - Crystal Growth and Design
ER -