TY - JOUR
T1 - Thiocyanate Anchors for Salt-like Iron(II) Complexes on Au(111)
T2 - Promises and Caveats
AU - Stock, Philipp
AU - Erbe, Andreas
AU - Buck, Manfred
AU - Wiedemann, Dennis
AU - Ménard, Hervé
AU - Hörner, Gerald
AU - Grohmann, Andreas
N1 - No funding info
PY - 2014/12
Y1 - 2014/12
N2 - The formation of self-assembled monolayers (SAMs) on Au(111) from solution has been investigated for two ionic iron(II) complexes of the type [Fe(L)](BF4)2, where L is tripodal hexadentate and contains three thiocyanate anchor groups. The ligands (L1, L2; donor set: N6) are obtained by Schiff base condensation of a tripodal triamine (L1: tris-(2-aminoethyl)amine, 'tren'; L2: 1,1' ,1″ -trimethyl(thiophosphoryl)trihydrazide) with 5-(4-thiocyanatobutoxy) pyridine-2-carbaldehyde. Layers of the complexes adsorbed on Au(111) from methanol solution have been characterised using scanning tunnelling microscopy (STM), infrared reflectance absorbance (IRRAS), X-ray photoelectron (XPS) and UV/Vis reflectance spectroscopies, as well as ellipsometry. Complex [Fe(L1)](BF4)2 deposits intact on a gold surface and retains its optical addressability. Elaboration of this result may provide access to a new class of self-assembled layers, employing salt-like tripodal coordination compounds with thiocyanate anchors. The second complex, [Fe(L2)](BF4)2, which contains a sulphur atom in the ligand backbone, is not sufficiently stable under the same conditions.
AB - The formation of self-assembled monolayers (SAMs) on Au(111) from solution has been investigated for two ionic iron(II) complexes of the type [Fe(L)](BF4)2, where L is tripodal hexadentate and contains three thiocyanate anchor groups. The ligands (L1, L2; donor set: N6) are obtained by Schiff base condensation of a tripodal triamine (L1: tris-(2-aminoethyl)amine, 'tren'; L2: 1,1' ,1″ -trimethyl(thiophosphoryl)trihydrazide) with 5-(4-thiocyanatobutoxy) pyridine-2-carbaldehyde. Layers of the complexes adsorbed on Au(111) from methanol solution have been characterised using scanning tunnelling microscopy (STM), infrared reflectance absorbance (IRRAS), X-ray photoelectron (XPS) and UV/Vis reflectance spectroscopies, as well as ellipsometry. Complex [Fe(L1)](BF4)2 deposits intact on a gold surface and retains its optical addressability. Elaboration of this result may provide access to a new class of self-assembled layers, employing salt-like tripodal coordination compounds with thiocyanate anchors. The second complex, [Fe(L2)](BF4)2, which contains a sulphur atom in the ligand backbone, is not sufficiently stable under the same conditions.
KW - Au(111)
KW - Iron(II)
KW - Magnetic properties
KW - Nitrogen ligands
KW - Responsive surfaces
UR - https://www.degruyter.com/view/j/znb.2014.69.issue-11-12/znb.2014-4159/znb.2014-4159.xml
UR - http://www.scopus.com/inward/record.url?scp=84930672080&partnerID=8YFLogxK
U2 - 10.5560/znb.2014-4159
DO - 10.5560/znb.2014-4159
M3 - Article
AN - SCOPUS:84930672080
SN - 0932-0776
VL - 69
SP - 1164
EP - 1180
JO - Zeitschrift für Naturforschung B: A Journal of Chemical Sciences
JF - Zeitschrift für Naturforschung B: A Journal of Chemical Sciences
IS - 11-12
ER -