Low-dimensional　hybrid　Cu(I)-based　halide　materials　are　a　new　class　of　materials　with　low　toxicity　and　excellent　photoluminescent　properties.　In　this　work,　five　novel　single　crystals　of　[1,4-BDA]Cu2X4　(X　=　Cl,　Br,　I)　(1,4-BDA:　1,4-butanediamine)　and　[1,3-PDA]2Cu3X7　(X　=　Cl,　Br)　(1,3-propanediamine)　were　obtained　using　a　solvent　evaporation　method.　The　[1,4-BDA]Cu2X4　(X　=　Cl,　Br,　I)　crystals　all　have　1D　structures,　while　the　[1,3-PDA]2Cu3X7　(X　=　Cl,　Br)　crystals　have　0D　structures.　All　five　single　crystals　exhibit　broadband　blue　emissions　under　254　nm　UV　excitation　at　room　temperature.　Interestingly,　both　crystals　show　a　gradual　blueshift　of　the　emission　peaks　with　increasing　halogen　atomic　mass,　realizing　tunable　emission　from　the　dark　blue　to　sky　blue　range.　The　energy　transfer　process　of　the　[1,4-BDA]Cu2Br4　single　crystal　was　studied　using　temperature-dependent　photoluminescence　spectroscopy.　Combined　with　density-functional　theory　calculations,　the　reason　for　the　shift　of　the　PL　emission　peaks　is　explained.　Notably,　by　altering　the　chemical　composition,　different　photoluminescent　halide　materials　can　be　obtained.　Providing　insight　into　the　discovery　of　new　low-toxicity,　low-cost　Cu(I)-based　halide　materials.　©　2025