Table 1. Screening of VLPC Catalysts in the Bromination of Naphthalene with NBS.

entrya	catalyst	% 3b	entrya	catalyst	% 3b
1	none	48	11	methylene blue	18
2	acridine orange	15	12	methylene green	77
3	azure A	31	13	Nile blue A	67
4	brilliant cresyl blue	27	14	pyronin Y	64
5	brilliant green	55	15	rhodamine 6G	61
6	DDQ	19	16	rhodamine B	60
7	eosin Y	0	17	rose bengal	87
8	erythrosine B	94	18	safranin O	54
9	fluorescein	58	19	thionin	71
10	9-mesityl-10-methylacridinium	75	20	[Ru(bpy)3]Cl2	0

^aConditions: 0.25 mmol naphthalene, 0.25 mmol NBS, 0.0125 mmol catalyst, 3 mL MeCN, air, 20 °C, white light-emitting diode (LED), 24 h.

^bGas chromatography (GC) yields calculated using adamantane as the internal standard.