Association between coach-athlete relationship and athlete engagement in Chinese team sports: The mediating effect of thriving.

Background: Coach-athlete relationship (CAR), thriving and athlete engagement are important psychological variables that affect sports performance. On the basis of self-determination theory, this study constructs a mediation model to examine the influence of CAR on athlete engagement and the mediating effect of thriving between them.

Methods: This cross-sectional study involves a questionnaire survey with 287 Chinese active athletes (M = 19.

Relationships among Sports Group Cohesion, Passion, and Mental Toughness in Chinese Team Sports Athletes.

Background: Passion is an important motivational variable that profoundly affects athletes' cognition, emotion, and behavior. This study constructed a mediating model to explore the mechanism of cohesion toward passion and mental toughness of Chinese team sports athletes and to investigate the mediating effect of harmonious passion and obsessive passion on cohesion and mental toughness.

Methods: A questionnaire survey was conducted on 326 Chinese active athletes (M = 19.

Catalyst- and solvent-free -hydroxylation of arylboronic acids to phenols.

A catalyst-free method for the hydroxylation of arylboronic acids to form the corresponding phenols with sodium perborate as the oxidant was developed using water as the solvent. Under the reaction conditions, the yield of phenol reached 92% at only 5 min. Moreover, the reaction could be conducted without a catalyst under the solvent-free condition, the efficiency of which was as high as that of a liquid-phase reaction.

Quinone-amine polymers as metal-free and reductant-free catalysts for hydroxylation of benzene to phenol with molecular oxygen.

Quinone-amine polymers were employed as metal-free and reductant-free catalysts for the hydroxylation of benzene to phenol with molecular oxygen, yielding phenol as high as the transition metal catalyst.