Can I claim items donated in January 2018 on 2017 taxes?

The new tax code changes were finalized late in 2017.  I was unable to organize and donate a large number of charitable items until January 2018.  I expect to use the new standard deduction for 2018 taxes so if I cannot find a way to claim the January 2018 donation on my 2017 taxes then it will not help my tax situation.  Thank you.