Supporting information

A highly sensitive and selective off–on fluorescent chemosensor for Al3+ based on naphthalene derivative

Figure S1. 13CNMR spectrum of macrocycle L

Figure S2. DEPT spectrum of macrocycle L

Figure S3. COSY spectrum of macrocycle L

Figure S4. HSQC spectrum of macrocycle

Figure S5. Mass Spectroscopy of [AlL]Cl3

Figure S6. 1H NMR of [AlL]Cl3.

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yitsn

etnI

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lA[ 3+lA[(/] 3+)]L[+]

Figure S7. Job’s plot for L+ Al3+.

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]Al3+[/]L[1.21.11.00.90.80.70.60.50.40.30.20.10.0

Figure S8. Changes in the absorption spectra of macrocycle L (10 µM) as a function of added Al3+ concentration in DMF/H2O (9:1, v/v). Excitation wave length was 280 nm. Both the excitation and emission slit widths were 5.0 nm.