TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Compound: The aromatic compound having fluoroether chain is represented by formula (4) or (5):(Rx2-D2-)m2-Ry3 orCx1x2=Cx3-(Cx4x5)n3(C=O)n4-D2-Ry4 (5).-D2- = -(-O-R2-)n2- or -(-R2-O-)n2-;R2,n2 = same as R and n defined above;Ry3 = 2-30C mono-tetravalent organic group having amines and/or their salts and having aromatic cyclic structure;m2 = 1-4;Rx2 = 1-20C fluorine-containing alkyl;X1-X5 = hydrogen or fluorine;X3 = hydrogen, fluorine, CH3 or CF3;n3,n4 = 0 or 1; andRy4 = 2-30C univalent organic group having amines and/or their salts and having aromatic cyclic structure.    TECHNOLOGY FOCUS - POLYMERS - Preferred Material: The ionic liquid type functional material comprises fluoropolymer containing 1-100 mol% of structural unit (M1 or M2) and 0-99 mol% of structural unit (A1 or A2). The fluoropolymer is represented by formulae -(M1)-(A1)- or -(M2)-(A2)-. The structural unit (A1 or A2) is structural unit derived from monomer that is copolymerizable with monomer that gives structural unit (M1 or M2). The structural unit (M1 or M2) is structural unit derived from ethylenic monomer.M1 = -D1-Ry1;-D1- = -(-O-R1-)n1- or -(-R1-O-)n1- (formula 2-1);R1,n1 = same as R and n defined above;Ry1 = 2-30C univalent organic group having basic functional group and/or its salt and having aromatic cyclic structure, preferably salts chosen from amine, imine, enamine, ketimine and/or azine;M2 = -Ry2-(-D1-Ra1)m1;Ry2 = 2-30C di- or tetravalent organic group having basic functional group and/or its salt and having containing aromatic cyclic structure, preferably salts chosen from amine, imine, enamine, ketimine and/or azine;Ra1 = 1-20C univalent organic group not containing D1, preferably 1-20C fluorine-containing alkyl;andm1 = 1-3.provided that structural units (M1,M2) and formula (2-1) does not include -O-O- unit. Preferred Definitions:    -D-=fluoro ether chosen from -(OCFZ1CF2)-, -(OCF2CF2CF2)-, -(OCZ32)-, -(CF2CF2CF2O)-, -(CFZ2O)- or -(CZ32O)-;    Z1,Z2=hydrogen, fluorine or CF;    Z3=CF3;    Ra=1-20C fluorine-containing alkyl group, or 2-2-C univalent organic group having basic functional group and/or its salt and having aromatic cyclic structure;and    Ry=basic functional group or their salts chosen from amines, imines, enamines, ketimines and/or azine.    EXAMPLE - Dehydrated dimethyl fluoride (150 ml), aminopyrimidine (10 g) and triethyl amine (10 g) were added to 4-neck flask. Then, long-chain fluorine-containing ether-containing acid fluoride (C3F7O-(CF2CF2CF2O)n-CF2CF2COF, where n is average of 10) (120 g) having mean molecular weight of 2000 was dripped slowly, and stirred at room temperature for 1 hour. The obtained reaction liquid was extracted with acid and water, and oil layer was removed. The oil layer was concentrated, to obtain long-chain fluorine-containing ether-containing (2-pyrimidine) amide (C3F7O-(CF(CF3)CF2O)12-CF(CF3)CONH-(2-pyrimidine)) (122 g). The obtained long-chain fluorine-containing ether-containing (2-pyrimidine) amide was insoluble in acetone and ethyl acetate, and was liquid at room temperature. The obtained long-chain fluorine-containing ether (2-pyrimidine) amide was effectively used as deacidification agent.