content_image/908231.jpg content_image/908230.jpg content_image/908228.jpg content_image/908229.jpg
[0061] Examples of the cation having formula (A-2) are shown below, but not limited thereto. 

<img src='content_image/908231.jpg'>

<img src='content_image/908230.jpg'>

[0062] The anion of the cyclic ammonium salt is a car› boxylate, sulfonamide, halogenated phenoxide or halide amon. 

[0063] Preferably, the carboxylate anion has the formula (B-1) or (B-2), the sulfonamide anion has the formula (B-3), and the halogenated phenoxide anion has the formula (B-4), all shown below. 

<img src='content_image/908228.jpg'>

<img src='content_image/908229.jpg'>

