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Solid state emission spectra of L1 and complexes 1–7 at room temperature (the determination of compound 4 was run with a small amount of samples, a few mg, and under conditions of the narrow slits of emission and excitation than other compounds). The peak of emission is 413 nm for L1, 463 (1), 462 (2), 383 (3), 390 (4), 425 (5), 388 (6), 411 (7), respectively.
