It's not wise to speak of a rotation 'around another point': rotation is ALWAYS about an axis, not a point. No, both motions (and associated energies) are independent of each other. Our results confirm the feasibility of simultaneously improving the efficiencies of photo- and thermal isomerization of oxindole-based light-driven molecular rotary motors and this design idea sheds light on the future development of more efficient molecular motors. And as for rotational, it can spin about its own axis, which would probably lower the needed energy to make it spin, or it can orbit around another point. A simple calculation then shows that kr2 mv2, or that the angular. After selecting two distinct axes, you will notice that the object resists the rotational change differently. The weakness of the steric hindrance reduces the energy barriers of the thermal helix EM → EP and ZM → ZP inversion steps, and would accelerate two ground-state isomerization steps significantly. Now take the example of a mass rotating tied to a spring, which supplies a force F-kr. The moment of inertia, as we all know, is affected by the axis of rotation. Furthermore, the rotary motion in photoisomerization processes of DDPYM behaves more like a pure axial rotational motion approximately, while that of DDIYM is an obvious precessional motion. The newly designed motor DDPYM shows a remarkable improvement of the quantum yield for both EP → ZM and ZP → EM photoisomerization processes, compared to the original motor DDIYM. recently, an oxindole-based light-driven molecular rotary motor, 3-(1,5-dimethyl-4,5-dihydrocyclopentapyrrol-6(1H)-ylidene)-1-methylindolin-2-one (DDPYM), is proposed, which displays a significant electronic push–pull character and weak steric hindrance for double-bond isomerization. By the small structural modification based on 3-(2,7-dimethyl-2,3-dihydro-1H-inden-1-ylidene)-1-methylindolin-2-one (DDIYM) synthesized by Feringa et al. The Merton rule was first published in 1335 at Merton College, Oxford by the English philosopher, mathematician, logician, and calculator William Heytesbury (. Care must be taken to use the correct moment of inertia. We designed a novel highly efficient light-driven molecular rotary motor theoretically by using electronic structure calculations and nonadiabatic dynamics simulations, and it showed excellent performance for both photo- and thermal isomerization processes simultaneously. Apply net I, net I, the rotational equivalent of Newtons second law, to solve the problem. Operational efficiencies of photo- and thermal isomerization of an oxindole-based light-driven molecular rotary motor are simultaneously improved by a structural redesign, and this design idea sheds light on the future development of more efficient molecular motors. Rotational stiffness is also significant in building construction, to calculate the rigidity of individual structural elements, beams, columns, arches.
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