You can also use substitute to remove {} and ".
New Table( "Test", Add Rows( 1 ),
New Column( "Column 1", Character, "Nominal",
Set Values( {"{\!"100@boiling\!",\!"0@melting\!"}"} )
),
New Column( "Column 2", Character, "Nominal",
Formula( Substitute( :Column 1, "{", "", "}", "", "\!"", "" ) ),
)
);