Three　molecular　photosensitizers　(PSs)　with　carboxylic　acid　anchors　for　attachment　to　platinized　titanium　dioxide　nanoparticles　were　studied　for　light-driven　hydrogen　production　from　a　fully　aqueous　medium　with　ascorbic　acid　(AA)　as　the　sacrificial　electron　donor.　Two　zinc(II)　porphyrin　(ZnP)-based　PSs　were　used　to　examine　the　effect　of　panchromatic　sensitization　on　the　photocatalytic　H-2　generation.　A　dyad　molecular　design　was　used　to　construct　a　difluoro　boron-dipyrromethene　(bodipy)-conjugated　ZnP　PS　(ZnP-dyad),　whereas　the　other　one　featured　an　electron-donating　diarylamino　moiety　(YD2-o-C8).　To　probe　the　use　of　the　ZnP　scaffold　in　this　particular　energy　conversion　process,　an　organic　PS　without　the　ZnP　moiety　(Bodipy-dye)　was　also　synthesized　for　comparison.　Ultrafast　transient　absorption　spectroscopy　was　adopted　to　map　out　the　energy　transfer　processes　occurring　in　the　dyad　and　to　establish　the　bodipy-based　antenna　effect.　In　particular,　the　systems　with　YD2-o-C8　and　ZnP-dyad　achieved　a　remarkable　initial　activity　for　the　production　of　H-2　with　an　initial　turnover　frequency　(TOFi)　higher　than　300　h(-1)　under　white　light　irradiation.　The　use　of　ZnP　PSs　in　dye-sensitized　photocatalysis　for　the　H-2　evolution　reaction　in　this　study　indicated　the　importance　of　the　panchromatic　sensitization　capability　for　the　development　of　light　absorbing　PSs.