Iodo-starch reaction

Tsuchiya et al utilized well-known iodo-starch reaction for sensing poly" hydroxy compounds. To realize that, amylose was modified with boronic acid moieties (Scheme 1.13). An aqueous solution containing the boronic acid-modified amylose and iodine (mixture of I2 andKI) is colored bluish purple due to encapsulation of iodine within the helical cavity of amylose. With increasing... 

However, in stud3ung more closely the mechanism of the degradation of peptone, it is observe that the effect produced, while being due to the action of the light, is not an immediate result of the same, but that still another very important factor is concerned. In fact, the albuminoid solution exposed to the sun gives a positive reaction with iodo-starch in iron sulphate... 

---