https://doi.org/10.1351/goldbook.08881
Dynamic polymeric entity whose macromolecules are composed of alternating simple or oligomeric molecules with two or more chelate end-groups (so-called unimers) and metal ions (so-called ion couplers) that are linked to chains by reversible coordination bonds (structure-based polymer class name):

Notes:
- An MSP is spontaneously formed upon mixing unimer(s) with ion couplers, because the activation energy of coordination binding is low. Therefore, the degree of polymerization of MSP is controlled by thermodynamics: it is low in a solution and/or at increased temperature but high in the solid state at room temperature. Due to these features, MSPs belong to the family of constitutional dynamic polymers, so-called dynamers. Constitutional dynamics gives to MSPs processing advantages and capability of self-healing.
- Examples are MSPs formed by self-assembly of 2,5″-bis(-2,2′:6′,2″-terpyridin-4′-yl)-5,2′:5′,2″- terthiophene with metal ions
. The MSP with ions exhibited electrochromism while that with ions showed the singlet fission.