Triazole in polymer under attack by ultrasound 2

A little more work on this topic and two additions:

First, as indicated in the graph, polymer solutions are degraded by ultrasound in a controlled manner. Timothy Mason, Sonochemistry, p 18. 

Second, forward triazole formation, one of the click chemistry examples, was reported to be accelerated by ultrasound, in small molecule context. See the 2011 article and cited ones.
Giancarlo Cravotto et al, "Power ultrasound in metal-assisted synthesis: From classical Barbier-like reactions to click chemistry"
Ultrasonics Sonochemistry Volume 18, Issue 4, July 2011, Pages 836-841

Triazole in polymer under attack by ultrasound

Well, it appears triazole, the iconic click chemistry product,  is under attack by ultrasound, reported by a recent CEN article (and many more coverage to come ?).

It would be more appropriate to put the reported "unclick the click" in the context, as the paper did Bielawski et al, Science 2011, Vol 333, No 6049, 1606 . 

 A few things to point out:

1. a very nice piece of work with ample solid data

2. brings sonochemistry to the front stage (again) using current popular click chemistry

3. similar reactions, reverse Diels-Alder and others are known chemistry

4. With a few scattered exceptions, physical methods such as ultrasound, light, microwave, etc, have yet to prove themselves on large scale in chemicals industry

5. Is forward triazole click chemistry aided by untrasound? Interesting to know

6. Note small molecules or small PMA polymers do not experience this untrasound unclick chemistry

7. Note the triazole linkage needs to be in the center of the PMA chain for this chemistry

8. This chemistry does NOT have much to do with triazole click chemistry or click chemistry in general 

9. Triazole group is known for its stability, hydrogen-bonding capability, amide-analogy, and its resistance to a wide range of chemicals 

Well, so much for now. Will work on triazole groupd chemistry / reactivity.