In an article in the newspaper Yeni Şafak, associated with the establishment line in Ankara, I found an interesting article from today in which economist Yousuf Dinç explains why Erdogan's Turkey wants the sanctions on Iran to be lifted. It is not out of love for Tehran, but out of love for money—and a lot of money.
His claim is sharp—the removal of sanctions on Iran is worth $300 billion to Turkey, although he did not specify over what period.
From his perspective, the story is not just a bit of trade between two neighbors. The idea is much bigger: an open Iran will turn Turkey into a hub of energy, trade, investments, and continental corridors between Asia, the Caucasus, the Middle East, and Europe.
In other words, judging by this article appearing in a newspaper close to the Turkish government, Turkey does not see the sanctions on Iran merely as a punishment for Tehran. They also see them as a barrier to the development of the Turkish economy.