ic302628y_si_006.cif (21.69 kB)
Synthesis and Study of Three Novel Macrocyclic Selena[n]ferrocenophanes Containing a Naphthalene Unit
dataset
posted on 2013-05-20, 00:00 authored by Wei Ji, Su Jing, Zeyu Liu, Jing Shen, Jing Ma, Dunru Zhu, Dengke Cao, Limin Zheng, Minxia YaoThree novel macrocyclic
ligands, L1–L3, in which a ferrocene unit and
a fluorescent moiety are linked to polyselena rings have been designed
and prepared from 1,1′-bis(3-bromopropylseleno)ferrocene. Reaction
of L with [M(NCMe)4](PF6)2 (M = Pd and Pt) led to complexes [ML](PF6)2 (M = Pd and Pt). Crystal structure analysis revealed
that after complexation, the macrocyclic ligand adopts the unusual c,c,c conformation due
to intramolecular C–H···π interactions
from the hydrogen atoms of ferrocene moieties to the naphthalene ring.
Electrochemical studies showed that in [ML](PF6)2 (M = Pd and Pt) the half-wave potential of the 1,1′-ferrocenediyl
group shifts to much more positive potentials due to electron density
withdrawn from Se donor atoms. Electrochemical and optical measurements
were used to calculate HOMO and LUMO levels as well as HOMO–LUMO
band gaps. Results were compared and correlated with the differences
in molecular structures.
