NOVELTY - Synthesizing metal meso-tetraphenylporphyrin polymer, comprises: (a) providing (802) free-base (hydrogen)-meso-tetra-4-(trialkylsilyl)ethynylphenylporphyrin (I); (b) converting (I) to metal-tetra-4-(trialkylsilyl)ethynylphenylporphyrin (II) (804), in response to reaction with metal-containing material; (c) converting (II) to metal-tetra-4-ethynylphenylporphyrin monomer (III) (806); and (d) coupling (808) many monomers of (III) to supply the polymer, so that meso-phenyl groups of adjacent monomers (III) in metal-meso-tetraphenylporphyrin polymer are connected through a butadiyne linking moiety.    USE - The method is useful for synthesizing a metal meso-tetraphenylporphyrin polymer (claimed), which is useful as a light-harvesting material in solar cells.    ADVANTAGE - The method: can be performed without using chromatographic purification (claimed), hence it is simple, and requires less time; provides the metal meso-tetraphenylporphyrin polymer, which exhibits improved yield, stability and solubility, and enhanced optical absorption characteristics, as compared to individual porphyrin monomers; and can be performed in an ambient environment without requirement of a vacuum atmosphere, inert gases or other environmental controls.    DETAILED DESCRIPTION - Synthesizing a metal meso-tetraphenylporphyrin polymer, comprises: (a) providing (802) a free-base (hydrogen)-meso-tetra-4-(trialkylsilyl)ethynylphenylporphyrin (I) including a trialkylsilyl moiety attached to an ethynyl termini; (b) converting (I) to a metal-tetra-4-(trialkylsilyl)ethynylphenylporphyrin (II) (804), in response to a reaction with a metal-containing material; (c) converting (II) to a metal-tetra-4-ethynylphenylporphyrin monomer (III) (806) by removing the trialkylsilyl moiety from the ethynyl termini; and (d) coupling (808) many monomers of (III) to supply the metal-meso-tetraphenylporphyrin polymer, so that meso-phenyl groups of adjacent monomers (III) in the metal-meso-tetraphenylporphyrin polymer are connected through a butadiyne linking moiety. An INDEPENDENT CLAIM is also included for a metal meso-tetraphenylporphyrin polymer comprising many monomers of (III) with meso-phenyl groups, and butadiyne linking moieties connecting the meso-phenyl groups of adjacent monomers of (III).    DESCRIPTION OF DRAWING(S) - The figure shows a flowchart of a method of synthesizing the metal meso-tetraphenylporphyrin polymer.    Providing step (802)    Converting (I) to (II) (804)    Converting (II) to (III) (806)    Coupling step (808)