Abstract: The invention provides a metal complex having a structure represented by the following formula (1): wherein M represents a metal atom such as copper; C1 and C2 are each an sp3 carbon atom; A1-A4 each independently represent hydrogen, etc; this is with the proviso that A1 and A3 may bond together to form a C4 or greater alkylene group and form a ring together with C1 and C2; the alkylene group may be optionally substituted; R0-R7 each independently represent hydrogen, etc; Z represents a monovalent monodentate ligand, and p is the number of monodentate ligands, represented by (“valency of central metal atom M” ?2).