[{"from": "human", "value": "Given SMILES, write its band gap at room temperature and atmospheric pressure. ->  O=C1C(CCCCCC)(CCCCCC)C(C2=C(C)SC(C(S3)=CC=C3C4=CC([Si]5(CC(CC)CCCC)CC(CC)CCCC)=C(S4)C6=C5C=C(C7=CC=C(C)S7)S6)=C21)=O\n"}, {"from": "gpt", "value": " 1.73\n"}]