Control experiments in the presence of some reagents as well as homologues of the filter paper 7 over the sonogashira cross-coupling model reaction^a.

Entry	Filter paper type/Pd complex	Time (min)	Conversion (%)
1	PdII-salen complexb5	70	Trace
2	PdII-salen-[IM]I	70	Trace
3	PdII-salen-[IM]OHb	70	60
4	PdCl2 (anhydrous)b	70	N.R.
5	Plain filter paperc	70	N.R.
6	FP@PdII-salenc	70	20
7	FP@salen-[IM]OH ligandc	70	N.R.

^aReaction conditions: Phenylacetylene (1.0 mmol), iodobenzene (1.0 mmol), EtOH : H₂O (2 : 1, v/v, 5.0 mL), filter paper/Pd complex (as a catalyst).

^b1.0 mmol.

^cFor entries 1–3, the reactions were stirred using a magnet bar. For entries 4–6, the reactions were conducted on a water bath. All the reactions were conducted under N₂ atmosphere and the Pd-loading was equal to 1.0 ± 0.3 mmol/95 cm².